[1078]*1078OPINION OF THE COURT
COWEN, Circuit Judge.
On July 20, 1988, a jury found Francisca Rosa Velasquez (“Velasquez”) guilty on one count of possession of greater than five kilograms of cocaine with intent to distribute, in violation of 21 U.S.C. § 841(a)(1), and one count of conspiracy, in violation of 21 U.S.C. § 846. On September 30, 1988, Velasquez was sentenced to 151 months in prison on both counts, to be served concurrently. Velasquez appeals her conviction on a number of grounds. For the reasons discussed below, we will affirm the conviction for possession but will reverse the conviction for conspiracy.
I.
On February 8, 1988, at 11:10 a.m., Velasquez and a companion, Ivan Terselich (“Terselich”) were driving a 1982 Ford LTD with Florida license plates northbound on Interstate 95 in Delaware. Corporal Robert Durnan (“Durnan”) pulled the vehicle over for speeding, after clocking the vehicle at 62 miles per hour in a 55 mile per hour zone. At Duman’s request, Velasquez identified herself and produced the Ford’s registration card, which indicated the car’s registered owner to be one Javier Perez, residing at 401 Southwest 18th Avenue, Miami, Florida.
Durnan asked Velasquez to exit the car and accompany him to an area on the shoulder of the turnpike between the rear of her car and the front of his patrol car. He then explained that she was being stopped for speeding. He asked her where she was going, and she answered that she was traveling from Miami to Long Island for a few days vacation with her husband, seated in the car. She also stated that the Ford belonged to her cousin, although she was unable to provide his name. Durnan testified that Velasquez was nervous and stuttered.
Durnan then spoke with Terselich, who was still seated in the Ford. Contradicting Velasquez, Terselich stated that she was not his wife and that he was traveling from Miami to New York on business, not vacation. He stated that the car belonged to his friend named Lopez. Terselich also appeared nervous.
Durnan testified that he asked Velasquez to accompany him into his patrol car to talk because it was warmer and quieter than the shoulder of the highway. When they were seated in his car, Durnan asked Velasquez if she had any contraband in the Ford. She replied that she did not, and he asked her for permission to search the car. He testified that she replied, “Yes, you can search.” Because he detected a Spanish accent in Velasquez’s voice, Durnan produced a written “Consent to Search” form in Spanish. He completed the form, explained it to Velasquez, and asked her to read and sign it. Velasquez examined and signed the form.
After obtaining Velasquez’s consent to the search, Durnan asked Terselich to step from the vehicle. He first searched the passenger area of the car. He then obtained the keys from Terselich, who had removed them from the ignition while Dur-nan was interviewing Velasquez. Durnan opened the Ford’s trunk and, within ten seconds, recognized a false floor in the trunk. While the underside of the car revealed a large well beneath the trunk area, the floor on the inside of the trunk was flat.
Durnan testified that, at this point, he believed that the trunk contained a secret compartment which concealed contraband, such as illicit drugs, weapons or money. He also believed that the secret compartment could only be reached by removing the gas tank, and he did not have the tools or facilities to do so. At approximately 11:20 a.m., Durnan advised Velasquez and Terselich that they were being detained under Delaware’s two-hour “detention” statute, DeLCode Ann. tit. 11, § 1902, and had them handcuffed and, along with the Ford, transported to Delaware State Police Troop 6. On arrival at the station, Velasquez was placed in a holding area by the main desk.1
[1079]*1079The Ford was placed on a lift, and Dur-nan attempted to remove the gas tank to get at what he believed was the secret compartment. He was unable to do so, because the filler tube which would normally flow into the gas tank had been altered to go into the secret compartment, and this hindered his efforts. He then took the vehicle down from the lift, opened the trunk, and removed a loose rug from the floor of the trunk. He noticed on the trunk floor a six inch-by-ten inch hinged door, which was locked. He pried the door open with a crowbar and immediately observed block packages, twenty-one in all, wrapped in a manner which Durnan recognized was customary to cocaine smuggling. On closer inspection and testing, the packages were found to contain twenty-one kilograms of cocaine.
After discovering the cocaine, Durnan testified that he read Velasquez Miranda warnings from a card, reading slowly, in English, and stopping after each sentence to ask if she understood. She answered in the affirmative each time. Durnan also testified that he provided Velasquez with a card containing the Miranda warnings in Spanish, which she held and appeared to read. Durnan then left the detention room and contacted Agent William Glanz (“Glanz”) of the Drug Enforcement Agency (“DEA”).
Between 12:30 and 1:00 p.m., Agent Glanz arrived at troop 6. In an interview room, Durnan introduced Glanz to Velasquez. Glanz showed Velasquez his credentials and explained that he was a federal agent with the DEA and wanted to talk with her. Velasquez immediately indicated that she did not wish to be questioned and that she would like to speak with a lawyer. The conversation ended at this point, and Durnan returned her to the holding room. Durnan and Glanz began attending to administrative details in another part of the building.
One half hour later, Durnan went to the holding area to take Velasquez into federal court to have her bail set by a United States Magistrate. Velasquez told Durnan that she wanted to speak to the federal agent again. Durnan brought Velasquez back to the interview room to speak with Glanz. According to Glanz, she asked him, “What is going to happen?” He explained, truthfully, that she would be brought before a magistrate and her bail would be set, and that the minimum mandatory sentence for possession of in excess of five kilograms of cocaine was ten years. This information was correct.
Velasquez then asked what would happen to her companion Terselich. Glanz testified that at this point he believed she was initiating a conversation about the investigation and that she was thereby waiving the Miranda rights which she had previously invoked. Glanz then provided her with misinformation. He told Velasquez that Terselich was being released because he had given a statement against Velasquez and that he was going to testify against her. Glanz also asked her if she wanted to give Terselich her belongings, because he would be traveling back south that evening.
Velasquez did not respond to these statements. Glanz then asked if she would like to tell her version of the story, and she responded by asking him what he wanted to know. He inquired as to who owned the car, to which she replied that she did not know. He then asked her how she came to be driving a car containing a large amount of cocaine. Glanz testified that she stated that she had been paid $10,000 to drive the drugs north, was afraid to make the trip alone, and was paying Terselich $5,000 to accompany her.2 When asked about Terse-[1080]*1080lich’s knowledge of the drugs, she did not respond directly, but shook her head several times and stated, “This is all my fault, this is all my fault.”
Glanz testified that he next asked Velasquez what she had planned to do with the drugs when she arrived in New York. She responded that she was to call Miami to receive a New York phone number, and that she was to then call that New York number and make arrangements to transfer the drugs. When asked about the number, she did not respond. At this point, Glanz terminated the interview, which had lasted ten to fifteen minutes, because of the need to bring Velasquez before a magistrate that afternoon.
Velasquez and Terselich were each indicted on two counts: possession with the intent to distribute more than five kilograms of cocaine, and conspiracy “with each other and with persons presently unknown to the grand jury” to possess cocaine with the intent to distribute. App. at 11. After pleading not guilty to the indictment, on March 28, 1988 Velasquez filed a motion to suppress the cocaine and her statements and for the determination of her competency to stand trial. The court denied the motion after a hearing and, as to the statements, after briefing.
On March 28, 1988, Velasquez’s counsel submitted to the district court the affidavit of Jorge A. Pereira-Ogan, M.D., in which Ogan rendered the opinion that Velasquez was unable to assist properly in her defense. The judge ordered that Velasquez be committed to a federal facility to undergo psychiatric examination pursuant to 18 U.S.C. § 4241 to aid in determining her competency to stand trial, and to undergo an evaluation pursuant to 18 U.S.C. § 4242, to aid in determining any question regarding her sanity at the time of the offense. From April 14 to June 15, 1988, Velasquez was held at the Federal Correctional Institute in Lexington, Kentucky. The forensic team which performed the court-ordered evaluation recommended that Velasquez was competent to stand trial. On June 29, 1988, after a hearing, the court entered an order finding Velasquez competent to stand trial.
A jury trial of Velasquez and co-defendant Terselich commenced in the district court on July 18, 1988, but on that day a mistrial was declared when the first witness testified to a statement that the court had previously excluded under Bruton v. United States, 391 U.S. 123, 88 S.Ct. 1620, 20 L.Ed.2d 476 (1968). On July 19 and 20, another trial was held, resulting in a jury verdict finding Velasquez and Terselich guilty as charged in both counts of the indictment. Velasquez’ motion for acquittal or, alternatively, for a new trial was denied. On September 30, 1988, she was sentenced to ten years for each offense, to run concurrently. She filed a notice of appeal with this Court on the same date. We have jurisdiction pursuant to 28 U.S.C. § 1291.
II.
Velasquez raises three major arguments on appeal. First, she argues that the war-rantless stop and search of the car on the highway was illegal and that the court erred in denying her motion to suppress the cocaine. Second, she argues that Delaware’s two-hour detention statute, under which she was held immediately prior to her arrest, is unconstitutional and therefore the court erred in denying her motion to suppress both the cocaine and the incriminating statement which she made while in police custody. Third, she argues that her statements made to the DEA agent were inadmissible because she had already invoked her right to counsel, and had not waived that right prior to making the statements. Because these are issues of law, our review is plenary.
A.
1. The stop
Velasquez first argues that the warrant-less stop and search of the car were unlawful, and that because the cocaine was the fruit of that unlawful stop and search, the [1081]*1081district court erred in denying her motion to suppress the cocaine. The fourth amendment to the Constitution states that “[t]he right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated....”
The Supreme Court has determined that stopping an automobile and detaining its occupants constitute a seizure within the meaning of the fourth amendment. Delaware v. Prouse, 440 U.S. 648, 653, 99 S.Ct. 1391, 1395, 59 L.Ed.2d 660 (1979). War-rantless automobile stops and detentions to check the driver’s license and registration are permissible, however, when they are based on an “articulable and reasonable suspicion that ... either the vehicle or an occupant” has violated the law. Id. at 663, 99 S.Ct. at 1401. We have noted specifically in the context of automobile stops that objective factors known to the seizing officer must support this suspicion. United States v. Hawkins, 811 F.2d 210, 213-215 (3d Cir.), cert. denied, 484 U.S. 833, 108 S.Ct. 110, 98 L.Ed.2d 69 (1987).
Velasquez testified during her competency hearing that she did not think that she was speeding at the time she was stopped, and that the car’s cruise control mechanism was activated and set at fifty-five miles per hour. App. at 155-56. However, neither Velasquez nor any other defense witness testified at the suppression hearing to controvert Duman’s testimony that she was speeding. Nor did her counsel argue during the hearing that she was not speeding. See app. at 438-42. Accordingly, the district court did not consider whether Velasquez was speeding when he ruled that the cocaine was admissible into evidence; rather, he assumed that she was speeding. Therefore, although Velasquez appears to argue on appeal that she was not speeding, see Appellant’s Reply Brief, at 3, she waived this issue by not arguing it below, Because this is an issue of fact which was not decided below, we do not reach it.3
2. The search
The district court denied Velasquez’s motion to suppress the physical evidence — the cocaine — obtained from the search. The court based its decision on its rulings that Velasquez lacked standing to object to the search and that she voluntarily gave her consent to the search. See app. at 448. As the court noted, either ruling by itself would be sufficient to support denial of the motion to suppress. See app. at 329-30.
We consider first the issue of Velasquez’s consent. A voluntarily given consent is an exception to the search warrant requirement and is therefore constitutionally permissible. Schneckloth v. Bustamonte, 412 U.S. 218, 93 S.Ct. 2041, 36 L.Ed.2d 854 (1973). The government has the burden of proving by a preponderance of the evidence that the search was made pursuant to a voluntary consent. United States v. Matlock, 415 U.S. 164, 177, 94 S.Ct. 988, 996, 39 L.Ed.2d 242 (1974); Bumper v. North Carolina, 391 U.S. 543, 548, 88 S.Ct. 1788, 1791, 20 L.Ed.2d 797 (1968).
The Supreme Court has instructed that a determination of whether a consent was voluntary must be based on the totality of the circumstances. See Schneckloth, 412 U.S. at 227, 93 S.Ct. at 2047. Borrowing from its previous analysis of the voluntariness of a defendant’s confession, the Court [1082]*1082explained the totality of the circumstances analysis for evaluating a consent to search:
Some of the factors taken into account have included the youth of the accused, his lack of education, or his low intelligence, the lack of any advice to the accused of his constitutional rights, the length of detention, the repeated and prolonged nature of the questioning, and the use of physical punishment such as the deprivation of food or sleep. In all of these cases, the Court determined the factual circumstances surrounding the confession, assessed the psychological impact on the accused, and evaluated the legal significance of how the accused reacted.
Id. at 226, 93 S.Ct. at 2047 (citations omitted).
Officer Durnan testified that when he asked Velasquez if she would consent, she replied, “Yes, you can search.” App. at 340. Their conversation was in English, and he encountered no language problems. App. at 338-39. Because he detected a Spanish accent, Durnan also provided her with a Spanish language consent to search form, and he explained the substance of the form and asked her to read it. Velasquez held the form for enough time to be able to read it, appeared to read it, and signed it. App. at 341-42, 949.
The consent took place on the shoulder of a major highway during daylight hours. App. at 331. Although the setting for Velasquez’s consent was Durnan’s patrol car, we perceive no coercion or overreaching in this. Durnan’s statement that he asked her to enter the car because it was warmer and quieter than outside is reasonable and uncontroverted. Velasquez’s companion Terselich was clearly visible from where she sat. App. at 345. Velasquez was not subjected to threats, promises or inducements, nor was she under the influence of alcohol or drugs. App. at 345.
Velasquez asserts on appeal that the district court erred in finding that she had not been arrested at this point, see appellant’s brief at 23. However, she was under reasonable investigative detention, and this does not constitute an arrest. Although Velasquez’ movement was curtailed, a traffic stop does not constitute the degree of custody associated with formal arrest in terms of its impact on consent. See Berkemer v. McCarty, 468 U.S. 420, 104 S.Ct. 3138, 82 L.Ed.2d 317 (1984).
Velasquez’s age, education and apparent intelligence also support a finding of volun-tariness. She is forty-three years old and college-educated. She has worked as a journalist. She has lived in the United States for at least the last fifteen years and has worked in Miami, Florida as a cosmetologist. The district court found that she can speak and understand English. App. at 470, 474. Although she was not told that she could refuse to consent, the Supreme Court stated in Schneckloth that “the prosecution is not required to demonstrate such knowledge as a prerequisite to establishing a voluntary consent.” 412 U.S. at 249, 93 S.Ct. at 2059. The individual’s knowledge of her right to refuse consent is only one factor in the totality of the circumstances inquiry. All the other factors here indicate that the consent was voluntary.4
Given the circumstances of this case, we determine that Velasquez voluntarily consented to allow Durnan to search her car. Therefore, the district court properly denied her motion to suppress the cocaine on [1083]*1083this basis.5
B.
Velasquez next argues that both the evidence discovered during the search of her car, and the incriminating statements she made to Agent Glanz, must be suppressed because she was unconstitutionally taken into police custody pursuant to Del. Code Ann. tit. 11, § 1902 (1985) (the Delaware “detention statute”). She contends that this statute is unconstitutional, because it authorizes a police officer to take a person into custody when the officer does not have probable cause to believe that person has committed a crime. She argues that since she was taken into custody pursuant to this statute, her “detention” was illegal and unconstitutional, and the evidence discovered as a result of this “detention” must be suppressed.
The United States argues that at the time Duman placed Velasquez under “two-hour detention,” he had probable cause to place her under arrest. In this regard, we note that even if the Delaware statute could not be sustained, this determination would not foreclose the United States from justifying Velasquez’s custody by proving probable cause. See Florida v. Royer, 460 U.S. 491, 507, 103 S.Ct. 1319, 1329, 75 L.Ed.2d 229 (1983) (plurality opinion) (“fact that officers did not believe there was probable cause and proceeded on a consensual or Terry stop rationale would not foreclose the State from justifying Royer’s custody by proving probable cause”); United States v. Hawkins, 811 F.2d 210, 214-15 (3d Cir.1987) (question of reasonableness of stop, like that of legality of arrest, depends on objective factors, and fact that pretextual reason was given for stop will not invalidate stop which was objectively reasonable); United States v. Belle, 593 F.2d 487, 496-97 (3d Cir.) (reviewing record to determine whether probable cause existed for arrest, even though detention was not originally characterized as an “arrest”), cert. denied, 442 U.S. 911, 99 S.Ct. 2825, 61 L.Ed.2d 277 (1979). Because we conclude that Durnan had, at the time, information which would have given him probable cause to arrest Velasquez, we need not address the issue of the constitutionality of the Delaware statute which permits detention based on less than probable cause.
The record here reveals that at the moment Durnan placed Velasquez under “two-hour detention,” he was aware of the following information: (1) that Velasquez and her companion had given him conflicting stories about the purpose of their trip and their relationship; (2) that she and her companion appeared nervous when answering his questions; (3) that Velasquez had told him the automobile she was driving belonged to her “cousin,” but could not give his name; (4) that Velasquez and her companion were on a long-distance trip from Miami, a major drug importation point, to the New York area; and (5) that the automobile she was driving had a false floor in its trunk and appeared to be specially modified to carry contraband in a secret compartment.
Given these facts, we find that Duman had a reasonable basis at that moment to believe that Velasquez and her companion were engaged in the interstate smuggling of contraband, most likely illegal drugs. We find that he had probable cause at that moment to arrest Velasquez. Accordingly, we conclude that Durnan’s seizure of Velasquez did not violate the fourth amendment. We, therefore, will not require that the evidence obtained as a result of her detention be suppressed, without consideration of the constitutionality of the Delaware statute.
C.
We next discuss Velasquez’ claim that the district court erred in denying her mo[1084]*1084tion to suppress the statements she made to Agent Glanz while in custody. Velasquez argues that she did not waive the Miranda rights which she had previously invoked and that the statements should not have been admitted.6
In its landmark decision in Miranda v. Arizona, the Supreme Court imposed certain obligations on police in custodial interrogations, in order to dissipate the “compelling pressures which work to undermine the individual’s will to resist and to compel him to speak where he would not otherwise do so freely.” 384 U.S. 436, 467, 86 S.Ct. 1602, 1624, 16 L.Ed.2d 694 (1966). Prior to questioning, the police must inform the suspect of his right to remain silent and his right to have counsel present during interrogation, as well as their intent to use his statements to secure a conviction. See id. at 468-70, 86 S.Ct. at 1624-26. They also must cease the interrogation if at any point the suspect indicates that he wishes to remain silent or that he wants an attorney. See id. at 473-74, 86 S.Ct. at 1627-28.
Miranda allows the suspect to waive these rights, “provided the waiver is made voluntarily, knowingly and intelligently.” Id. at 444, 86 S.Ct. at 1612. The inquiry has two components. First, the waiver must have been voluntary “in the sense that it was the product of a free and deliberate choice rather than intimidation, coercion or deception.” Moran v. Burbine, 475 U.S. 412, 421, 106 S.Ct. 1135, 1141, 89 L.Ed.2d 410 (1986) (citing Fare v. Michael C., 442 U.S. 707, 725, 99 S.Ct. 2560, 2572, 61 L.Ed.2d 197 (1979)). Second, the waiver “must have been made with a full awareness both of the nature of the right being abandoned and the consequences of the decision to abandon it.” Id.
In Edwards v. Arizona, the Supreme Court held that an accused person in custody who has invoked his desire not to speak until he has conferred with counsel “is not subject to further interrogation ... until counsel has been made available to him, unless the accused himself initiates further communication, exchanges, or conversations with the police.” 451 U.S. 477, 484-85, 101 S.Ct. 1880, 1885, 68 L.Ed.2d 378 (1981). The Court in Edwards provided that two factors must be present before a suspect in custody may be subjected to further interrogation after he has requested an attorney, see id. at 485, 486 n. 9, 101 S.Ct. at 1885 n. 9, and the Court later articulated these factors as a two-part test in Oregon v. Bradshaw, 462 U.S. 1039, 103 S.Ct. 2830, 77 L.Ed.2d 405 (1983). First, the suspect must initiate the conversation with the authorities, not vice versa. Second, after the suspect initiates the conversation, the waiver of the right to counsel and the right to silence must be knowing and voluntary. Id. at 1045-46, 103 S.Ct. at 2834-35.
1. The initiation requirement
Eight Justices in Bradshaw agreed that a two-step process applies in determining whether the suspect waived his rights, but they disagreed over what constitutes an “initiation” by the suspect. The four-Justice plurality stated that questions which “evinced a willingness and a desire for a generalized discussion about the investigation” would suffice. 462 U.S. 1039, 1046, 103 S.Ct. 2830, 2835. The four dissenters accepted the two-step analysis but required a more stringent test for establishing an initiation, defining “initiation” as “communication or dialogue about the subject matter of the criminal investigation.” Id. at 1053, 103 S.Ct. at 2839 (Marshall, J., dissenting) (emphasis in original). Justice Powell, providing the swing vote, [1085]*1085rejected the two-step approach but considered the confession admissible because the defendant had knowingly and intelligently waived his rights. Id. at 1051, 103 S.Ct. at 2833 (Powell, J., concurring).
The Supreme Court has not addressed this specific issue since the Bradshaw case, nor have any lower courts provided guidance on this issue. Thus, uncertainty persists as to what constitutes an initiation. Although we are not bound by the Bradshaw plurality opinion on this issue and are free to apply either the plurality’s or the dissent’s test, we choose to adopt the plurality view that an initiation occurs when a suspect initiates a conversation “evincpng] a willingness and a desire for a generalized discussion about the investigation.” 462 U.S. at 1046, 103 S.Ct. at 2835. We think that such a conversation is a reasonable middle ground between a routine statement purely incidental to the custodial relationship — for example, a request to use the bathroom — which cannot fairly be said to fulfill the first part of the Bradshaw plurality’s test, and a more detailed statement about the subject matter of the investigation. The latter statement, while clearly satisfying the first part of the test, may set an unduly high standard. Such a standard might convert the prophylactic value of the initiation requirement, announced in Edwards and further developed in Bradshaw, into an overly stringent substantive hurdle.
The Supreme Court in Bradshaw characterized the initiation requirement not as a constitutional right itself, or a component thereof, but as “in effect a prophylactic rule, designed to protect an accused in police custody from being badgered by police officers in the manner in which the defendant in Edwards was.” Id. at 1044, 103 S.Ct. at 2834. We think that the substantive aspects of a suspect’s statement are better considered in the second prong of the two-prong Bradshaw test, i.e., whether a voluntary and intelligent waiver has occurred considering the totality of the circumstances. Thus, until further guidance by the Supreme Court, we will apply the plurality’s definition of “initiation” in this context.
The Bradshaw plurality also noted that an “initiation” must be evidenced by more than “merely a necessary inquiry arising out of the incidents of the custodial relationship.” 462 U.S. at 1046, 103 S.Ct. at 2835. The plurality explained: “There are some inquiries, such as a request for a drink of water or a request to use a telephone, that are so routine that they cannot be fairly said to represent a desire on the part of an accused to open up a more generalized discussion relating directly or indirectly to the investigation.” Id. at 1045, 103 S.Ct. at 2835. The Bradshaw dissenters, naturally, did not disagree with this principle.
2. The initiation by Velasquez
After discovering the cocaine, Officer Durnan read Velasquez her Miranda warnings, and shortly thereafter Durnan brought in Agent Glanz and introduced Velasquez to him. Glanz showed her his credentials and explained that he wished to speak with her. She indicated that she did not wish to be questioned and would like to consult an attorney, and the interview was terminated. One half hour later Velasquez asked Durnan to get the investigator, Glanz, because she wanted to speak to him. When Velasquez was brought back to the interrogation room with Glanz, the ensuing conversation between them led to Velasquez’s incriminating statements.
Velasquez first asked Glanz, “What is going to happen?”. We think that this question, taken on these facts, reflected Velasquez’s willingness to engage in “a generalized discussion about the investigation.” Bradshaw, 462 U.S. at 1046, 103 S.Ct. at 2835. By asking the question, Velasquez initiated the conversation. While the question itself may not be free of all ambiguity, its context supports the conclusion that it was directed toward the investigation. This is so because Velasquez specifically requested to speak with the federal investigator, rather than to the state police officer who was about to bring her before a magistrate. We think that Velasquez desired to discuss the investigation, and that the question was not merely a routine inquiry incidental to her custodial [1086]*1086relationship. Indeed, the question which Velasquez asked Glanz is almost identical to the question asked by the suspect in Bradshaw and which the Supreme Court held evinced a general desire to discuss the case. Therefore, the first prong of the Bradshaw test has been satisfied.7
3. The waiver requirement
The Supreme Court in Miranda stated that a suspect informed of his right to counsel and right to remain silent may waive those rights if the waiver is “made voluntarily, knowingly and intelligently.” 384 U.S. at 444, 86 S.Ct. at 1612. We must make this determination considering “the totality of the circumstances.” Bradshaw, 462 U.S. at 1046, 103 S.Ct. at 2835 (quoting Edwards v. Arizona, 451 U.S. at 486 n. 9, 101 S.Ct. at 1886 n. 9). In analyzing the totality of the circumstances, we must look at the facts of the particular case, including the background, experience, and conduct of the suspect. See Bradshaw, 462 U.S. at 1046, 103 S.Ct. at 2835.
In addition, the government has the burden of proving the waiver by a preponderance of the evidence. Colorado v. Connelly, 479 U.S. 157, 168-69, 107 S.Ct. 515, 522-23, 93 L.Ed.2d 473 (1986). Whether a confession made by a suspect in custody was voluntary is a purely legal issue for our plenary review, see Miller v. Fenton, 796 F.2d 598, 601 (3d Cir.), cert. denied, 479 U.S. 989, 107 S.Ct. 585, 93 L.Ed.2d 587 (1986), and whether a waiver was voluntary, knowing and intelligent is likewise subject to plenary review.8
4. The waiver by Velasquez
Before commencing a totality of the circumstances analysis of Velasquez’s waiver, we address a preliminary issue. The district court determined that Velasquez had waived her Miranda rights when she asked her second question, “What is going to happen to Ivan?” The court expressly declined to consider the effect of Glanz’s deceptions on Velasquez’s state of mind.9 [1087]*1087We think that the district court misapplied Bradshaw in determining that the waiver occurred immediately when Velasquez asked her first question.
As the Supreme Court pointed out in Bradshaw, the initiation of a conversation by defendant does not by itself constitute a waiver of previously invoked Miranda rights. See Bradshaw, 462 U.S. at 1044, 103 S.Ct. at 2834. Rather, the Court held only that when the accused initiates a conversation — and, as discussed above, the conversation must evince a desire to discuss the case generally — then further interrogation of the accused may take place. See, id.; see also Wyrick v. Fields, 459 U.S. 42, 46, 103 S.Ct. 394, 395, 74 L.Ed.2d 214 (1982) (per curiam). After the first . Bradshaw prong, initiation, has been satisfied, interrogation is permitted. Satisfaction of the second prong, voluntary, knowing and intelligent waiver, is then possible, depending on the totality of the circumstances.
By asking her first question (“What is going to happen?”), Velasquez initiated the conversation and evinced a desire for a generalized discussion about the investigation. The waiver did not occur, however, until after she had asked her second question regarding what would happen to Terselich. In response to that question, Glanz provided her with misinformation about Terselich. Immediately thereafter, she made the incriminating statements which are the focus of the present dispute, and, as discussed below, by doing so she waived her right to counsel and right to silence. Thus, the waiver occurred after the misinformation was given to Velasquez, and our assessment of the validity of the waiver must include examination of the effect of the misinformation.10
We now address whether the waiver was “knowing and intelligent” under the totality of the circumstances. An examination of Velasquez’s background reveals that she is a mature adult, forty-three years of age. She was born in Colombia, South America, where she graduated from college and worked as a journalist. She is able to speak and understand English. She has lived in the United States for at least fifteen years, and has worked in Miami as a cosmetologist.
Velasquez evidently understood the import of the Miranda warnings given by Durnan, because she invoked her right to counsel one half-hour before she made her incriminating statements. Although a psychiatrist testified at the competency hearing that she had suffered psychological trauma arising from the arrest, sufficient evidence was presented to demonstrate that she understood the legal proceedings concerning her, and the functions of the judge, jury, and counsel. We conclude that Velasquez possessed “a full awareness both of the nature of the right being abandoned and the consequences of the decision to abandon it.” Moran v. Burbine, 475 U.S. at 421, 106 S.Ct. at 1141. Thus, her waiver was knowing and intelligent.
We next turn to the more difficult issue of voluntariness. With regard to the nature of her confinement and interrogation, the district court found that Velasquez had been in custody for less than two hours at the time she made her statements, and that no threats or promises were made. App. at 474. Nor was she ill-treated. After the cocaine was found, she was given her Miranda warnings. The failure of Glanz to provide her with new Miranda warnings impacts only slightly on the validity of her waiver, because only a short time had passed between her receiving the Miranda warnings and her requesting to speak with Glanz.
Aside from her psychological problems, the only factor supporting a finding that [1088]*1088her waiver was not voluntary was Glanz’s false statement to Velasquez about Terse-lich making a statement against her and being set free. The Supreme Court has stated that a waiver must have been voluntary “in the sense that it was the product of a free and deliberate choice rather than intimidation, coercion or deception.” Moran v. Burbine, 475 U.S. at 421, 106 S.Ct. at 1141. The Court has also advised, however, that lies told by the police do not necessarily make a confession involuntary; rather, this is simply one factor to consider out of the totality of the circumstances. Frazier v. Cupp, 394 U.S. 731, 739, 89 S.Ct. 1420, 1425, 22 L.Ed.2d 684 (1969). We have stated that “[w]hile a lie told to the detainee about an important aspect of the case may affect the voluntariness of the confession, the effect of the lie must be analyzed in the context of all the circumstances of the interrogation.” Miller, 796 F.2d at 607.
In the Frazier case, Frazier was arrested in connection with a murder and was questioned by police. He admitted being with his cousin Rawls on the night in question, but he denied being with any third person. In the midst of questioning he was given his Miranda warnings, after which questioning became more vigorous. The officer questioning Frazier then told him, falsely, that Rawls had been brought in and had confessed. Shortly thereafter, Frazier began to confess and eventually he signed a written confession. 394 U.S. at 737-38, 89 S.Ct. at 1423-24.
The Supreme Court rejected Frazier’s claim that his confession was involuntary and should have been excluded from evidence. 394 U.S. at 739, 89 S.Ct. at 1425. As the Court noted, the fact that a suspect was given warnings of his constitutional rights prior to making the incriminating statement is “quite relevant to a finding of voluntariness.” Id.; see also Davis v. North Carolina, 384 U.S. 737, 740-41, 86 S.Ct. 1761, 1763-64, 16 L.Ed.2d 895 (1966). The Court looked at the age, intelligence, maturity and length of detention of Frazier, and concluded that “[t]he fact that the police misrepresented the statements that Rawls had made is, while relevant, insufficient in our view to make this otherwise voluntary confession inadmissible.” 394 U.S. at 739, 89 S.Ct. at 1425.
In Miller v. Fenton, 796 F.2d 598 (3d Cir.), cert. denied, 479 U.S. 989, 107 S.Ct. 585, 93 L.Ed.2d 587 (1986), another case involving the voluntariness of a confession, the murder suspect, Miller, was given his Miranda warnings and was then interrogated. The interrogating police officer employed an approach which involved befriending and sympathizing with Miller. In addition, at the beginning of the interrogation, the officer informed Miller that the victim was still alive, which was false. During the interrogation, the officer told Miller that she had just died, when in fact she had been found dead several hours earlier. 796 F.2d at 602.
We concluded in Miller that the lie about the timing of the victim’s death, by itself, did not constitute sufficient deception to overcome Miller’s will. We stated that “[bjecause [the officer] never suggested that the time of [the victim’s] death might be relevant in linking Miller to the crime, the only possible effect of [his] initial statement that she was alive, followed by his report that she had just died, would be an emotional response in Miller.” Id. at 607. This response, we held, did not occur.
We recognize that both Frazier and Miller dealt with the issue of voluntariness of a confession, whereas the instant issue involves the voluntariness of a waiver of Miranda rights. However, there is a paucity of case law to guide us in the area of deception in the Miranda waiver context. Moreover, these cases are helpful to our analysis of the waiver issue, because the analytical framework applied in the confession context — the totality of the circumstances — is also the proper approach to the waiver issue. See Oregon v. Bradshaw, 462 U.S. at 1046, 103 S.Ct. at 2835.
The instant case presents a deception which seems to fall closer to the facts of Frazier than those of Miller. As in Frazier, the false information here went directly to the suspect’s connection to the crime. In Frazier, the false statement was that [1089]*1089Frazier’s cousin had confessed. This, in connection with Frazier’s previous admission that he had been with his cousin on the night of the murder, was designed to make the suspect think that the evidence against him was stronger than it actually was. Likewise, in the instant case Velasquez was told that Terselich had stated that the drugs were hers and that she had been paid $5,000 to drive the drugs north from Miami. This falsehood, like that in Frazier, had the effect of greatly inflating the state’s evidence of the suspect’s guilt.
Finally, Velasquez specifically asked to speak with Agent Glanz, thus indicating that it was likely that she wanted to discuss the investigation and less likely that the statement was a spontaneous reaction to Glanz’s falsehood. Moreover, the false statement was given to Velasquez in response to her own specific question about her co-suspect. It was not volunteered by the interrogating officer.
Although the deception may have been a partial cause of Velasquez’s statements, we do not think that her will was overcome or her capacity for self-control vitiated.11 Moreover, as in Frazier, all the other factors point towards voluntariness. Considering the totality of the circumstances, we think that Velasquez voluntarily waived her right to counsel and her right to remain silent. Thus, we affirm the district court’s decision to deny her motion to suppress her statements.
D.
Velasquez raises an additional issue which we briefly address. She contends that the district court erred in determining that she was competent to stand trial. The statute governing a defendant’s competency to stand trial states in relevant part:
If, after the hearing, the Court finds by a preponderance of the evidence that the defendant is presently suffering from a mental disease or defect rendering him mentally incompetent to the extent that he is unable to understand the nature and consequences of the proceedings against him or to assist properly in his defense, the Court shall commit the defendant to the custody of the Attorney General.
18 U.S.C. § 4241(d). At the competency hearing, the Government has the burden to prove the defendant’s competency. United States v. DiGilio, 538 F.2d 972, 988 (3d Cir.1976), cert. denied, 429 U.S. 1038, 97 S.Ct. 733, 50 L.Ed.2d 749 (1977). The district court’s finding of competency is a factual finding which we review under the clearly erroneous standard. McFadden v. United States, 814 F.2d 144, 146 (3d Cir.1987); see also Maggio v. Fulford, 462 U.S. 111, 103 S.Ct. 2261, 76 L.Ed.2d 794 (1983).
At the competency hearing, the defense asserted not that Velasquez did not understand the nature and consequences of the criminal action against her, but that Velasquez was not competent bécause she was unable to cooperate and assist her attorney in a rational manner. See app. at 275. The psychiatrists for both the defense and the prosecution agreed that Velasquez suffered from an adjustment disorder with mixed emotional features, namely, depression and, according to the defense psychiatrist, anxiety. The psychiatrists disagreed on whether Velasquez was competent to stand trial. The district court found that Velasquez was merely exercising poor judgment in not disclosing certain information to her counsel, but that, how[1090]*1090ever irrational her decisions not to disclose information were, she was not incapable of assisting counsel by reason of mental defect. See app. at 276-78. Under the circumstances, we cannot say that the district court’s determination that Velasquez was competent is clearly erroneous.12
III.
Velasquez also argues that the evidence was insufficient as a matter of law to support her convictions for possession and conspiracy to possess. She contends that both the cocaine and the statements to Agent Glanz should be suppressed, and that if either item were suppressed the evidence would be insufficient to sustain a conviction. See Appellant’s Brief, at 29-31. We need not decide this issue as she has framed it, of course, because we have already held that both the cocaine and the statements were properly admitted.
We find the evidence sufficient to support a conviction for possession. The evidence to support conviction is sufficient if “any rational trier of fact could have found the essential elements of the crime beyond a reasonable doubt.” Jackson v. Virginia, 443 U.S. 307, 319, 99 S.Ct. 2781, 2789, 61 L.Ed.2d 560 (1979) (emphasis in original). Moreover, Velasquez “bears a ‘very heavy burden,’ since [the evidence] must [be] view[ed] in the light most favorable to the government and ... all permissible inferences [construed] in its favor.” United States v. Gotay, 844 F.2d 971, 978 (2d Cir.1988). Velasquez ignores that the jury is allowed to draw a reasonable inference, from her statements and the presence of the cocaine, that she knew about the cocaine. Moreover, actual knowledge of the cocaine — established either by inference or by direct proof — need not have been shown at all, because the jury was also instructed on the theory of “deliberate ignorance”. See app. at 920-22. Thus, sufficient evidence exists to support a conviction for possession.
The jury’s verdict on the conspiracy charge is more problematic. The difficulty here arises from our recent disposition of an appeal filed by Velasquez’s alleged coconspirator, Ivan Terselich. United States v. Terselich, 885 F.2d 1094 (3d Cir.1989). Velasquez was indicted for conspiring with Terselich and other unknown and unnamed individuals, see app. at 11, while Terselich was indicted for conspiring with Velasquez and other unknown and unnamed individuals. After a joint trial, both were found guilty of conspiracy.
In our opinion deciding Terselich’s appeal, we concluded that the United States had not presented sufficient evidence to prove that he was guilty of conspiracy, and that the district court had erred, as a matter of law, when it did not grant Terselich’s motion for a judgment of acquittal notwithstanding the jury verdict finding him guilty. We therefore reversed his conviction and remanded for entry of a judgment of acquittal.
Since our disposition of Terselich’s appeal could not have been anticipated by Velasquez, we think it appropriate to raise, sua sponte, the issue of the impact of this disposition on Velasquez’s conspiracy conviction. Velasquez does argue that the United States did not present sufficient evidence to support the jury’s finding of guilt, see discussion supra, and an assessment of the impact of our reversal of Terselich’s conviction on Velasquez's conviction is, in important respects, related to this argument.
As noted above, we have already concluded that the United States did not present sufficient evidence to demonstrate that Terselich joined the conspiracy alleged in the indictment. Since there was insufficient evidence for the jury to conclude that [1091]*1091Terselich joined the conspiracy, we necessarily find that there was also insufficient evidence for the jury to conclude that Velasquez conspired with Terselich. The only issue remaining, as we see it, is whether the jury impermissibly based its conviction of Velasquez on a finding that she conspired with Terselich, or whether the jury permissibly found that Velasquez conspired with unknown and unnamed individuals, as was also charged in the indictment.
There is, of course, no way for us to conclusively determine the basis of the jury’s decision. It is significant, however, that the indictment alleged that Velasquez conspired with Terselich, that the government went forward with the case on that primary theory, and that the jury concluded, impermissibly, that Terselich was a member of the conspiracy. Given this record, we find there is a substantial likelihood that the jury’s verdict finding Velasquez guilty of conspiracy was based on an impermissible determination that she conspired with Terselich. We will therefore reverse Velasquez’s conspiracy conviction. See Yates v. United States, 354 U.S. 298, 312, 77 S.Ct. 1064, 1073, 1 L.Ed.2d 1356 (1957) (“A verdict [must] be set aside in cases where the verdict is supportable on one ground, but not on another, and it is impossible to tell which ground the jury selected.”); Cramer v. Fahner, 683 F.2d 1376, 1379-80 (7th Cir.) (“Where a verdict is supportable on one ground but not another, and it is impossible to tell which grounds the jury selected, the conviction is unconstitutional”) (citing Stromberg v. California, 283 U.S. 359, 368, 51 S.Ct. 532, 535, 75 L.Ed. 1117 (1931)), cert. denied, 459 U.S. 1016, 103 S.Ct. 376, 74 L.Ed.2d 509 (1982). This charge is remanded to the district court, where the United States is free to seek a retrial on the charge on the theory that Velasquez conspired with unknown and unnamed individuals.13
[1092]*1092IV.
For the reasons discussed above, we affirm Velasquez’s conviction for possession with intent to distribute of more than five kilograms of cocaine. We will reverse her conviction for conspiracy, and remand for further disposition in accordance with this Opinion.