COFFEY, Circuit Judge.
The government, as plaintiff, filed this civil action for the forfeiture of $84,000 in U.S. currency seized from the claimants pursuant to 21 U.S.C. § 881(a)(6). Donald Holmes and Max Reyes, as claimants, answered the government’s forfeiture claim contesting the legality of the seizure of the currency and the applicability of the forfeiture statute. The district court held that 21 U.S.C. § 881(a)(6) was applicable and that the currency had not been illegally seized. We affirm.
On the evening of September 10, 1981, Drug Enforcement Administration (“DEA”) Agent Michael Streicher and Chicago Police Officer Rosemary Burzinski were assigned to Chicago’s O’Hare International Airport to monitor the arrival of passengers on flights from certain “source cities” in an effort to control the flow of illegal drugs.1 The law enforcement officers were awaiting the arrival of United Airlines Flight 149 from Fort Lauderdale, Florida, a DEA designated source city, to observe the passengers as they left the aircraft. At approximately 8:45 p.m., Flight 149 parked at United Airlines Gate F-7, and the passengers deplaned and walked into the concourse. Two members of the first group to emerge from the gate were the claimants, Donald Holmes and Max Reyes.
Holmes and Reyes milled around the gate area after deplaning, glancing about as if looking for someone or something. The officers’ attention was attracted to the two young men because of their anxious manner, suspicious conduct, casual dress and the fact that Holmes was fair-skinned and displayed no tan; all factors fitting the DEA “drug courier profile”2 utilized by officers to alert them to possible drug traffickers.
Following their survey of the gate area, Holmes and Reyes entered the concourse and proceeded to a television monitor screen displaying the arrival and departure times of United Airlines flights. After viewing the screen for what seemed to Officer Burzinski to be an inordinately long period of time, Holmes and Reyes continued down the concourse corridor followed by Agent Streicher and Officer Burzinski. The appellants walked slowly down the corridor toward the junction of Concourses E and F, glancing back over their shoulders several times as if trying to determine whether they were being followed. Holmes and Reyes entered a cocktail lounge located at the juncture and purchased two drinks. Agent Streicher and Officer Burzinski then observed the claimants leave the lounge and take their drinks to the check-in area at Gate E-2. The officers at this time positioned themselves opposite the gate to continue their observation.
Holmes and Reyes stood in line at Gate E-2 and checked in for a 9:35 p.m. flight to Omaha, Nebraska. After reserving their seats, the claimants walked away from the [1093]*1093gate and were approached by Agent Streicher and Officer Burzinski. The law enforcement officers promptly identified themselves and asked Holmes and Reyes for identification. The claimants produced first-class tickets and driver’s licenses issued in their appropriate names. Officer Burzinski asked Holmes and Reyes if they were traveling with luggage and they replied they were. The officers noticed, however, that Reyes’ ticket portfolio contained no baggage claim stub and they questioned him about the discrepancy. Reyes’ ticket was returned to him and he proceeded to the check-in counter to inquire about the issuance of a baggage claim check. During this conversation between the officers and the claimants, Reyes’ voice quivered, and both he and Holmes appeared to the officers to be nervous throughout the encounter.
Prior to Reyes’ return to the check-in counter, the claimants were asked by Agent Streicher and Officer Burzinski during the initial encounter if they would voluntarily consent to a search of their luggage. After being advised of their right to refuse, the claimants agreed to let the officers search their baggage. Officer Burzinski then copied down Holmes’ claim ticket number and a description of Reyes’ luggage and left the corridor to contact United Airlines personnel about locating the claimants’ luggage. After originally giving his consent and while Burzinski was arranging for the search of the luggage, Reyes voiced some hesitation about consenting to a search of his luggage. To allay Reyes’ fears, Agent Streicher informed the claimants “that [the officers] were not interested in small quantities of marijuana or pills or coke, and that if ... all they had in their luggage was a small quantity, that [the officers] would just check that, and if there was some [the officers] would take it and discard it and they could be on their way.” In response to Agent Streicher’s comments, the claimants stated that their bags contained small quantities of marijuana and cocaine and that they would allow the officers to open the luggage.
Officer Burzinski returned to the group after arranging with United Airlines personnel for the segregation of Holmes’ and Reyes’ luggage. Shortly thereafter, the officers were informed that the luggage had been placed in a basement area below Gate E-2. Officer Burzinski, Agent Streicher, Holmes and Reyes descended a flight of stairs and entered a small, dark non-public area. The claimants identified the luggage located in the secluded area as theirs but prior to searching the baggage Agent Streicher noticed bulges in Reyes’ pants legs at the tops of his boots. Agent Streicher stated that for his safety he “patted down” Reyes and felt a hard object which he was unable to identify by touch. Streicher then directed Reyes to remove his boots and bundles of money spilled out of his pants legs and his boots. Streicher placed the money in Reyes’ suitcase and proceeded to search Holmes who also had large quantities of money in his boots and inside his waistband and pants legs.
A search of Reyes’ and Holmes’ suitcases uncovered small quantities of marijuana and cocaine. The claimants were placed under arrest, informed of their Miranda rights and taken, along with their suitcases, to the DEA office at O’Hare.3 Holmes and Reyes were processed and the money in their possession was counted in their presence. In the case of Reyes, $30,000 of the money found on his person was confiscated by the officers and $25 was returned to him. The officers seized $54,000 of the money discovered in Holmes’ suitcase and on his person and returned $91 to him. A DEA supervisor, Joseph Salvemini, arrived and interviewed the claimants. After the claimants completed and signed written statements regarding the seized currency they were released and conveyed by Streicher and Burzinski to a nearby hotel to await the next flight to Omaha the following morning.4
[1094]*1094On March 17, 1981, the United States filed its complaint for civil forfeiture of the $84,000 seized under 21 U.S.C. § 8815 and Holmes and Reyes filed their claims thereafter. The claimants denied that the monies were used or were intended to be used for illegal purposes and alleged that their constitutional rights had been violated during the seizure of the funds. A trial was held in the district court and a judgment was entered ordering the appellants’ previously confiscated $84,000 forfeited to the United States. It is from the court’s order of forfeiture that the claimants appeal.
ISSUES PRESENTED
Issue 1: Did the district court err in determining that the $84,000 involved herein was not seized in violation of Holmes’ and Reyes’ constitutional rights?
Issue 2: If the circumstances of the seizure did not give rise to a constitutional violation, did the district court commit error in determining that the monies taken from Holmes and Reyes were properly forfeited to the United States?
I.
The claimants contend that the evidence introduced by the government in support of the forfeiture was illegally obtained in violation of their constitutional rights for the following reasons:
(A)The initial encounter between the law enforcement officers and Holmes and Reyes constituted an unlawful arrest and detention in violation of their Fourth Amendment rights against unreasonable seizures;
(B) The money uncovered during the “pat down” searches of their persons was illegally obtained in violation of their Fourth Amendment rights against unreasonable searches; and
(C) The statements signed by the claimants while in custody were improperly procured and involuntarily given and the admission of the statements violated their Fifth Amendment rights against self-incrimination.
The government concedes the applicability of the exclusionary rule to forfeiture proceedings but contends the district judge properly concluded that the government demonstrated that no violation of the claimants’ constitutional rights occurred. United States v. Eighty-Eight Thousand, Five Hundred Dollars, 671 F.2d 293, 297 n. 6 (8th Cir.1982). In order to review the propriety of the district court’s determination of the legality of the actions of the law enforcement officers, we will address each of the claimants’ alleged constitutional violations separately.
A.
First of all, Holmes and Reyes maintain that the initial contact by the government agents was an unlawful seizure rendering all evidence obtained thereafter (including the funds seized and the statements obtained while the claimants were under arrest) inadmissible as “fruit of the poisonous tree.” Wong Sun v. United States, 371 U.S. 471, 488, 83 S.Ct. 407, 417, 9 L.Ed.2d 441 (1963). This court has recently reiterated the test to be applied in determining whether a seizure has occurred in an airport police/citizen encounter such as the one involved herein. See United States v. Seven[1095]*1095ty-Three Thousand, Two Hundred Seventy-Seven Dollars, 710 F.2d 283, 288 (7th Cir.1983) (citing Florida v. Royer, — U.S. —, 103 S.Ct. 1319, 75 L.Ed.2d 229 (1983)). Applying the objective “reasonable person” test we affirm the district court’s determination that no seizure of Holmes and Reyes occurred until after the officers and the claimants entered the non-public area below Gate E-2, as the appellants were free to leave up until that time and voluntarily accompanied the officers.
In affirming the forfeiture in Seventy-Three Thousand, Two Hundred Seventy-Seven Dollars, this court followed Justice Stewart’s “reasonable person” test, as set forth in United States v. Mendenhall, 446 U.S. 544, 554, 100 S.Ct. 1870, 1877, 64 L.Ed.2d 497 (1980), in determining whether a seizure has occurred in an airport surveillance case.
“[A] person has been ‘seized’ within the meaning of the Fourth Amendment only if, in view of all the circumstances surrounding the incident, a reasonable person would have believed that he was not free to leave.”
Mendenhall, 446 U.S. at 554, 100 S.Ct. at 1877 (footnote omitted).
The determination of whether Holmes and Reyes were seized under the “reasonable person” test is a highly factual one, dependent upon the specific circumstances of this case. Our standard of review is limited to inquiry into whether the district court’s determination is clearly erroneous, and requires that particular deference be given to the district judge who had the opportunity to hear the testimony and observe the demeanor of the claimants and the law enforcement officers. Seventy-Three Thousand, Two Hundred Seventy-Seven Dollars, 710 F.2d at 288.6
Three major issues are addressed in reviewing an airport police/citizen encounter: (1) the conduct of the police; (2) the characteristics of the individual citizen; and (3)the physical surroundings of the encounter. Id. at 289.
In examining the conduct of Agent Streicher and Officer Burzinski, the district court had to determine whether “the officer[s], by means of physical force or show of authority, had in some way restrained the liberty of [the claimants] such as [they were] not free to walk away.” United States v. Moya, 704 F.2d 337, 341 (7th Cir.1983) (citing United States v. Black, 675 F.2d 129, 134 (7th Cir.1982), cert. denied, — U.S. —, 103 S.Ct. 1520, 75 L.Ed.2d 945 (1983)). In reviewing all the testimony, the trial judge came to the conclusion “that there was not any threatening presence by the officer and the agent. There was no display of weapons here. The officers were in civilian clothes. There was no use of language or a tone of voice indicating that compliance might be compelled or would be compelled.” Relying on the record before us we hold that the findings of the district court are not clearly erroneous and we defer to the findings and conclusion of Judge Kocoras who was in the best position to weigh the evidence before him.
[1096]*1096The characteristics of the individual defendants are another factor for the court to consider in determining whether even a facially innocuous encounter might, under the circumstances, have overborne the citizens’ freedom to walk away. Here, there is no evidence to even suggest that Holmes and Reyes were either so naive or vulnerable to coercion that special protection from police contacts was required by the Fourth Amendment. Seventy-Three Thousand, Two Hundred Seventy-Seven Dollars, 710 F.2d at 289-90.
The third element of this circuit’s test to determine whether a police/citizen encounter was voluntary or coerced is the physical setting of the area where the encounter took place. Here, the initial encounter between the officers and the claimants occurred in a public concourse of the airport in the immediate presence of other travelers. The district court specifically determined that “[t]he agents, as in Mendenhall, approached the subjects here in a public place, and I find that a reasonable person could have concluded that he or she was free to walk away.” Based on the factors first outlined by this court in Black and most recently reaffirmed in Seventy-Three Thousand, Two Hundred Seventy-Seven Dollars, we affirm the district court’s well-reasoned determination and ruling that no seizure occurred during the initial encounter between the officers and the claimants in the public concourse area of O’Hare International Airport and that the claimants were free to walk away at that time.
It is interesting to note that the dissent has chosen to disregard the accepted case law of this circuit concerning the appropriate deference to be given the factual findings of the trial court. It is not the function of the appellate court to “retry issues of fact or substitute its judgment with respect to such issues for that of the trial court.” Aunt Mid, Inc. v. Fjell-Oranje Lines, 458 F.2d 712, 718 (7th Cir.), cert. denied, 409 U.S. 877, 93 S.Ct. 130, 34 L.Ed.2d 131 (1972) (quoting Cleo Syrup Corp. v. Coca-Cola Co., 139 F.2d 416, 417-18 (8th Cir.1943), cert. denied, 321 U.S. 781, 64 S.Ct. 638, 88 L.Ed. 1074 (1944)). The dissent, however, chooses to credit the testimony of the claimants and accepts their version of what occurred on the evening in question. The dissent does this although the district court expressly noted:
“I did observe all of the witnesses in this case, and I made an evaluation based on the backgrounds, motives and the reasonableness of their testimony, in light of all of the other evidence in the case, and in light of my own common sense
* * * * * *
[T]o the extent my findings and conclusions differ from the testimony of Holmes and Reyes, then I chose not to credit their testimony.”
By accepting the discredited testimony of the claimants as the proper recitation of the facts herein, the dissent attempts to reach a desired result rather than follow the established precedent of this circuit. United States v. Black, 675 F.2d 129 (7th Cir.1982), cert. denied, — U.S. —, 103 S.Ct. 1520, 75 L.Ed.2d 945 (1983); United States v. Moya, 704 F.2d 337, 340-41 (7th Cir.1983); and United States v. Seventy-Three Thousand, Two Hundred-Seventy-Seven Dollars, 710 F.2d at 288.7
[1097]*1097B.
After the claimants’ conversation with Agent Streicher and Officer Burzinski at Gate E-2, the four individuals descended the steps and proceeded to the area below Gate E-2 to inspect the claimants’ luggage. The district court found “that the defendants knowingly and voluntarily consented to the searches of the luggage prior to the searches of [it] downstairs” and also that the claimants voluntarily accompanied the officers downstairs in order to identify their luggage. This finding of the district court distinguishes this case from that addressed by the Supreme Court in Royer. In Royer, the police officers retained the suspect’s driver’s license and ticket during questioning and the suspect did not give consent to the search of his luggage (which had been removed from the plane without his consent) until he was in a secluded, coercive setting. Royer, 103 S.Ct. at 1327. In the case at bar, Reyes and Holmes voluntarily consented to the search of their luggage prior to any detention.
Prom our review of the record, it is evident that the district court’s factual determination that the claimants freely decided to accompany the officers downstairs and allowed them to search their luggage was not clearly erroneous.8 Holmes and Reyes accompanied the officers downstairs and consented to the searches of their luggage in hope that by “going along” with the officers, their relatively small quantities of marijuana and cocaine would be confiscated and they would be on their way without any further investigation into their activities and had it not been for the discovery of the bulges in Reyes’ pants and the bundles of money found during the pat-down search, the appellants would have been released. Reyes and Holmes voluntarily accompanied the officers in a spirit of apparent cooperation.
Upon entering the dimly lit, secluded and narrow corridor area below Gate E-2, Agent Streicher gave Reyes a visual “once-over.” The unarmed Streicher observed bulges in Reyes’ boots and, according to his own testimony, patted down the claimant’s lower leg area “for [his] own safety and protecting [himself].” Agent Streicher “didn’t know what was inside [the] pants leg” and upon feeling an unidentified hard object asked Reyes to remove his boots. Reyes responded that he would need some help with the task and Streicher assisted him. As Reyes’ boots were removed, bundles of cash fell from his pants legs and boots. Reyes and Holmes were subsequently arrested and a total of over $84,000 was found secreted on their persons and in a suitcase.
The claimants challenged Agent Streicher’s pat-down search as being unreasonable under the Fourth Amendment. The district court found the search to be [1098]*1098lawful on two independent bases, only one of which we will consider herein.9 For the reasons stated hereafter, we affirm the district court’s determination that Agent Streicher was certainly justified in requiring a full search of Reyes for his own safety and that of his partner after observing a bulge and undertaking a pat-down of the top of Reyes’ boots (an area where weapons are often secreted) and, thus, the search was not unreasonable and in violation of the defendants’ Fourth Amendment rights.
The propriety of a law enforcement officer’s protective search was first addressed in the Supreme Court’s Terry v. Ohio, 392 U.S. 1, 88 S.Ct. 1868, 20 L.Ed.2d 889 (1968) decision. In Sibron v. New York, 392 U.S. 40, 88 S.Ct. 1889, 20 L.Ed.2d 917 (1968), the Court stated:
“In the case of the self-protective search for weapons, [the police officer] must be able to point to particular facts from which he reasonably inferred that the individual was armed and dangerous.”
392 U.S. at 64, 88 S.Ct. at 1903.
Our review of Agent Streicher’s actions must be guided by the Court’s statements in Terry which follow:
“[I]n justifying the particular intrusion the police officer must be able to point to specific and articulable facts which, taken together with rational inferences from those facts, reasonably warrant that intrusion.”
392 U.S. at 21, 88 S.Ct. at 1880 (footnote omitted).
“The officer need not be absolutely certain that the individual is armed; the issue is whether a reasonably prudent man in the circumstances would be warranted in the belief that his safety or that of others was in danger.”
392 U.S. at 27, 88 S.Ct. at 1883.
Concurring in Royer, Justice Brennan recently noted:
“Terry simply held that under certain carefully defined circumstances a police officer ‘is entitled for the protection of himself and others in the area to conduct a carefully limited search of the outer clothing ... in an attempt to discover weapons which might be used to assault him.’ ”
Royer, 103 S.Ct. at 1330 (quoting Terry, 392 U.S. at 30, 88 S.Ct. at 1884).
In reviewing Agent Streicher’s conduct in light of all the testimony before it, the district court concluded:
“[T]here was a reasonable suspicion, and, in fact, knowledge of criminal activity on the part of both claimants; and a search of the persons at the place made, which was downstairs, for the protection and safety of the agent and officer was justified; and this was particularly true after Agent Streicher said that he saw a bulge in the pants’ leg of Mr. Reyes.
“I viewed the cash in this case, and I did see how much room all of that cash was required to take on a person — although it was that one had about some 30-some thousand and one had about 50-some thousand; but in any event, that was a lot of cash, and it is very hard for me to imagine how it would not cause a bulge on the person. Agent Streicher said he saw a bulge, and I credit that testimony.”
Our review of the record in the instant case convinces us that the conduct of Agent Streicher in “patting down” Reyes was justified within the law and the district court correctly determined that it was not unreasonable under the Fourth Amendment.
The officer's attention was first attracted to the claimants when their appearance and conduct was in conformance with [1099]*1099the DEA-devised drug courier profile.10 The claimants’ furtive and anxious movement through the airport terminal further heightened the officers’ suspicions that something unusual was possibly at foot. During the officers’ constitutionally permissible encounter with Reyes and Holmes, the claimants were anxious and nervous and only slightly less so after the officers informed them that they (the officers) were not interested in small quantities of contraband. At this time, the officers arranged for the retrieval of the claimants’ luggage and United Airlines personnel placed it beneath Gate E-2 in a compact, dark nonpublic area illuminated only by “Exit” signs. In this secluded, confined area where the search took place Agent Streicher was unarmed and Officer Burzinski’s pistol was not readily available as it was contained in an ankle holster under the police officer’s jeans. Under the totality of the circumstances, Agent Streicher was legitimately wary of the vulnerable positions the officers would be in if they were to be physically challenged by either of the appellants during the inspection of the luggage. To further heighten Streicher’s uneasiness, the DEA agent noticed bulges under the pants of Reyes immediately above his boots.
As noted by the district court, it appears reasonable that the secretion of over $30,-000 upon Reyes’ person would result in perceptible bulges under his clothing. Under the above-outlined circumstances, we cannot say that the conduct of Agent Streicher in performing the pat-down weapons search of Reyes was unjustified and unreasonable under the Fourth Amendment as construed by the Supreme Court in Terry and Sibron.
Secluded as he was with Officer Burzin-ski and the claimants, in a two-on-two situation, it was reasonable for Agent Streicher, unarmed, to fear being confronted and overpowered by the defendants and to take the necessary precaution to visibly and physically ascertain if in fact the suspects were armed. It was not unreasonable for Agent Streicher to suspect that a drug trafficker might be armed. United States v. Post, 607 F.2d 847, 851 (9th Cir.1979). Nor was it unreasonable for the agent to suspect that the bulges observed near the top of Reyes’ boots might be firearms, as this “was perhaps the most obvious place a weapon would have been concealed.” State v. Long, 37 N.C.App. 662, 246 S.E.2d 846, 851 (1978). In fact, Officer Burzinski carried a pistol in an ankle holster beneath her pants leg.
We affirm the district court’s ruling that the pat-down search of Max Reyes was justified as a “reasonably prudent man in the circumstances would [have been] warranted in the belief that his safety or that of others was in danger.” Terry, 392 U.S. at 27, 88 S.Ct. at 1883.
C.
The claimants challenge the admissibility of the statements they made to Special Agent Joseph Salvemini following their arrest. The signed statements recited, in pertinent part:
“My name is Donald Holmes .... I went to Ft. Lauderdale on . .. the 6th of September 1980. At that time I had approximately $54,000 in cash with me which I intended to use to purchase marijuana. ...
“When I went to Florida I met with Max E. Reyes and together we attempted to purchase marijuana from four different people .... We were not successful because things are very tight in [FJlorida and no marijuana was available....
“On 9/10/80 Max Reyes and I decided to return to Nebraska because we could not score any drugs. When we got off the plane in Chicago we were stopped by [1100]*1100two drug officers who asked us to give them permission to examine our luggage and search our persons which we gave. The officers seized a small quantity of marijuana and about 54,000 in cash from me. I have been told that the U.S. Government intends to proceed against the 54,000 and to seize the money because it was intended to be used in a drug transaction. I have also been told that the U.S. Attorney’s office has indicated that I will not be prosecuted for the marijuana I had in my possession. I have been advised of my Miranda warnings, my right to remain silent and my right to counsel and to a speedy araignment [sic] before a judge or a magistrate.
“I have decided to foregoe [sic] the aforementioned rights and instead to give this statement to the officers. I have been told by S/A Joseph Salvemini that this statement will not be used against me in any criminal proceeding, however, I have been told that it will be used in a civil forefiture [sic] proceeding against the approximate $54,000 I had in my possession at the time I was detained....
“I have read this statement consisting of two handwritten pages and signed each page and initialed all corrections. This statement is freely and voluntarily given and no promises of reward or threats have been made against me.
/s/ Donald Holmes”
“My name is Max E. Reyes. ... On [T]hursday September 4, 1980 I traveled to Ft. Lauderdale, Florida with approximately $30,000 in cash which I intended to use to purchase marijuana.... When Phil was unable to make the marijuana connection for me I decided to return to Omaha....
“On 9/10/80 I decided to return to Omaha. Upon my arrival in Chicago I was stopped by two narcotic[s] officers who identified themselves as such and requested me to authorize a voluntary search of my person and luggage, which I consented to. The officers seized a small quantity of drugs and a small amount of marijuana from me. I was then advised of my Miranda warnings, my right to remain silent and my right to counsel and to a speedy araignment [sic] before a judge or a magistrate.
“I elected to forgoe [sic] the aforementioned rights and instead to give this statement to the officers. I have been advised by S/A Joseph Salvemini that this statement will not be used against me in any criminal proceeding, however, I have been told that it will be used in a civil forfeiture [sic] proceeding against the proximate $30,000 I had in my possession at the time I was detained.
* * * * * *
While in [F]lorida I only managed to score a small amount of marijuana which was of such poor quality that I decided to return to Omaha without making a large scale purchase.
“I have read this statement consisting of two handwritten pages and signed each page and initialed all corrections. This statement is freely and voluntarily given and no promises of reward or threats have been made against me.
/s/ Max E. Reyes”
It is contended that the highly incriminating statements were improperly obtained by Salvemini via “the ultimate promise; nothing in the statement [would] be used against them.” According to the claimants’ argument to this court, “[although they were told that the government would attempt to use the statements in a forfeiture action, the government’s attempt to split legal hairs with the distinction between criminal proceedings and civil forfeiture proceedings, is tenuous at best, and certainly not something the average citizen would contemplate or comprehend.” Accordingly, the claimants argue, the taking of the statements by Special Agent Salvemini and their subsequent admission at the forfeiture hearing violated the claimants’ Fifth Amendment rights.
Responding to a similar challenge at the trial below, the district court found that the claimants had received their Miranda warn[1101]*1101ings on two different occasions before giving the .written statements and “that both claimants knowingly and voluntarily waived those rights.” The district court also determined that:
“The written statements expressly acknowledge the Government’s intended use of the statements in civil forfeiture proceedings. There was not any mystery about that, and the statements clearly reflect that.”
Based on our review of the record herein, the district court made a thorough and proper inquiry into the voluntariness of the statements by the claimants. The court thoroughly analyzed the testimony of the officers regarding the claimants’ Miranda rights and determined that no threats, tricks or deception were employed to elicit the statements. Montes v. Jenkins, 626 F.2d 584, 590 (7th Cir.1980).
The claimants made their statements to Special Agent Salvemini after being fully advised of the government’s intended use of them. The statements signed by the appellants each contained the following statement:
“I have been advised by S/A Joseph Sal-vemini that this statement will not be used against me in any criminal proceeding, however, I have been told that it will be used in a civil forefiture [sic] proceeding against the [currency].”
Contrary to the claimants’ contentions, we do not believe the district court committed error by allowing the admittance of the statements nor was sanctioning the “splitting of legal hairs.” The claimants were only promised that the government would not prosecute them criminally and were expressly informed that their statements would be used in the civil forfeiture proceeding the government intended to institute based on the claimants’ signed statements that they had attempted and/or intended to purchase controlled substances with the monies. Under the circumstances herein, we hold that the claimants were not duped into cooperating with the government in violation of their Fifth Amendment rights, but rather were treated honestly and fairly and received the benefit (no criminal prosecution) that they bargained for.
II.
Appellants contend the evidence presented to the district court does not mandate the forfeiture of the $84,000 seized from Holmes and Reyes as the language of the forfeiture statute (21 U.S.C. § 881) does not encompass the situation involved herein.11 The claimants argue that at the time of the seizure of the currency any intent on their part to use the currency to purchase controlled substances had passed and the monies were not properly subject to the forfeiture statute. The district court found that the signed statements of the claimants expressly stated the illegal purpose for which the cash was going to be used and thus the cash was properly subject to forfeiture.
The government’s burden was only to show probable cause for the forfeiture proceedings, and it surely did so. The burden then shifted to Reyes and Holmes as claimants to show by a preponderance of the evidence that the property was not subject to forfeiture. United States v. Fleming, 677 F.2d 602 (7th Cir.1982). Reyes and Holmes had to offer proof that the currency was not “furnished or intended to be furnished ... in exchange for a controlled substance.” 21 U.S.C. § 881(a)(6). As the statements given to Special Agent Salvemini were properly determined by the trial court to be admissible, no question exists that the $84,000 in currency was intended to be furnished by Reyes and Holmes in exchange for controlled substances in violation of sub-chapter 1 of Chapter 13 of the United States Code Title XXI. That being the case, there is no question that 21 U.S.C. § 881(a)(6) mandates forfeiture of the currency to the United States.
Currency is forfeitable when it is used, or intended or attempted to be used, in violation of the federal controlled sub-[1102]*1102stances laws, although physical seizure of the currency occurs thereafter. United States v. Kemp, 690 F.2d 397, 401 (4th Cir.1982); O’Reilly v. United States, 486 F.2d 208, 210 (8th Cir.), cert. denied, 414 U.S. 996, 94 S.Ct. 546, 38 L.Ed.2d 334 (1973). In effect, the government’s interest arises at the time the object is used or generated in violation of the statute, and not at the time of the seizure or at the time of a judgment in the civil forfeiture proceeding. United States v. Stowell, 133 U.S. 1, 16, 10 S.Ct. 244, 247, 33 L.Ed. 555 (1890); Simons v. United States, 541 F.2d 1351, 1352 (9th Cir.1976). Therefore, we hold the $84,000 seized was subject to forfeiture, pursuant to 21 U.S.C. § 881(a)(6), to the United States when the claimants attempted to purchase a controlled substance in Florida, even though the seizure did not occur until the defendant arrived in Illinois and the district court did not order it forfeited to the United States until several months after its seizure. Accordingly, the district court’s decision ordering forfeiture was proper and is Affirmed.