OPINION OF THE COURT
EAGEN, Chief Justice.
These appeals1 were entered by the Commonwealth2 from an order of the Court of Common Pleas of Philadelphia granting defendant David Stokes’ motion to suppress certain incriminatory statements given to the police following his arrest. The court below ordered suppression of Stokes’ statements on the basis that this evidence was the product of an illegal arrest. We agree and, accordingly, affirm the order.
The charges against Stokes arose out of the robbery and fatal shooting of John J. Meehan at 1133 N. 63rd Street, Philadelphia, on July 1, 1976.
On August 14, 1976, Detective Terrence Gibbs was assigned primary responsibility for investigating Meehan’s death. That same day Detective Gibbs stopped a youth named Gregory Staulings on a street corner to ask if he knew anything about the Meehan Killing. Staulings told Detective Gibbs that, he had been told by another youth, one Anthony Ramsey, that David Stokes had told Ramsey that “he and some other guys had got a body up on 63rd Street.” Subsequently, Staulings gave a written statement at homicide headquarters.
[43]*43On August 15, 1976, Detective Gibbs dispatched Sergeant Richard Strohm to question seventeen-year-old Anthony Ramsey about the Meehan killing. At about 5:00 p. m., in the presence of his mother at their home, Ramsey confirmed Staulings’ information and added that Stokes had told him “they had shot the white man on 63rd Street when they were out to rob somebody and that the man died.” Further, Ramsey said that Stokes had asked him not to tell anyone. Ramsey and his mother were taken to police headquarters where Ramsey gave a statement which was signed by Ramsey and his mother.
Solely on the basis of the information provided by Gregory Staulings and Anthony Ramsey, Detective Strohm concluded there was probable cause to arrest Stokes.3 At 5:10 p. m., he radioed Detective Gibbs to make the arrest. At 5:15 p. m., Detective Gibbs and Officer Barlow went to Stokes’ residence where they arrested him without a warrant in the presence of his father and sister and, thereafter, transported him to homicide headquarters. Stokes’ subsequent oral and written statements admitting participation in the crime were ordered suppressed as the product of an illegal arrest.4
The law is clear that a warrantless arrest is not lawful unless there is probable cause therefor. McCray v. Illinois, 386 U.S. 300, 87 S.Ct. 1056, 18 L.Ed.2d 62 (1967); Ker v. California, 374 U.S. 23, 83 S.Ct. 1623, 10 L.Ed.2d 726 (1963); Commonwealth v. Johnson, 467 Pa. 146, 354 A.2d 886 (1976). Whether there is probable cause to arrest without a warrant depends on whether, at the moment a suspect is taken into custody, the facts and circumstances within the officer’s knowledge, and of which he has reasonably trustworthy information, are sufficient to warrant a man of reasonable caution to believe that an offense has been committed and that the person to be arrested has committed the offense. Commonwealth v. Johnson, supra; Common[44]*44wealth v. Jones, 457 Pa. 423, 322 A.2d 119 (1974); Commonwealth v. Mackie, 456 Pa. 372, 320 A.2d 842 (1974); Commonwealth v. Norwood, 456 Pa. 330, 319 A.2d 908 (1974).
Thus, in order to arrest without a warrant, the officer must have a reasonable belief in the probability of criminal activity by the person to be arrested. However, that belief need not be grounded in the officer’s direct, personal knowledge of the relevant facts and circumstances. It may, instead, rest solely on information supplied by another person where there is a “substantial basis” for crediting that information. United States v. Harris, 403 U.S. 573, 91 S.Ct. 2075, 29 L.Ed.2d 723 (1971); Jones v. United States, 362 U.S. 257, 80 S.Ct. 725, 4 L.Ed.2d 697 (1960); Draper v. United States, 358 U.S. 307, 79 S.Ct. 329, 3 L.Ed.2d 327 (1959).
This Court has held that information provided by certain classes of persons may be sufficient to establish probable cause. It is well-settled that the uncorroborated confession of an accomplice which implicates the suspect will supply the probable cause for a warrantless arrest. Commonwealth v. Johnson, 467 Pa. 146, 354 A.2d 886 (1976); Commonwealth v. Rush, 459 Pa. 23, 326 A.2d 340 (1974); Commonwealth v. Kenney, 449 Pa. 562, 297 A.2d 794 (1972); Commonwealth v. Bradley, 449 Pa. 19, 295 A.2d 842 (1972). See also Commonwealth v. Matthews, 446 Pa. 65, 285 A.2d 510 (1971). Similarly, the statement of a victim, identifying the perpetrator of a crime, has been found sufficient to establish probable cause for that person’s arrest. Commonwealth v. Hall, 456 Pa. 243, 317 A.2d 891 (1974). Further, information provided by an eyewitness whose identity is known has also been deemed sufficient. Commonwealth v. Carter, 444 Pa. 405, 282 A.2d 375 (1971); Commonwealth v. Crawley, 209 Pa.Super. 70, 223 A.2d 885 (1966). Cf. Commonwealth v. Mamon, 449 Pa. 249, 297 A.2d 471 (1972). Thus, in determining whether probable cause exists, we have tended to credit information supplied by one who has some direct personal knowledge of the crime.
[45]*45In the instant case, the arresting officer relied on information supplied by an informant who was neither an accomplice, nor an eyewitness, nor a victim of the crime. The information provided by Ramsey amounted to hearsay by one who had no first-hand knowledge of the crime.
It is well-settled that even hearsay information is sometimes sufficient to establish probable cause. See Draper v. United States, 358 U.S. 307, 79 S.Ct. 329, 3 L.Ed.2d 327 (1959). However, before an officer may conclude there is probable cause to arrest based on hearsay information, he must satisfy the two-pronged test of Aguilar v. Texas, 378 U.S. 108, 84 S.Ct. 1509, 12 L.Ed.2d 723 (1964), as explicated in Spinelli v. United States, 393 U.S. 410, 89 S.Ct. 584, 21 L.Ed.2d 637 (1969): (1) he must know the underlying circumstances from which the informer concluded the suspect participated in the crime; and, (2) he must have some reasonable basis for concluding that the informant is credible or that his information is reliable. See also Commonwealth v. Brooks, 468 Pa.
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OPINION OF THE COURT
EAGEN, Chief Justice.
These appeals1 were entered by the Commonwealth2 from an order of the Court of Common Pleas of Philadelphia granting defendant David Stokes’ motion to suppress certain incriminatory statements given to the police following his arrest. The court below ordered suppression of Stokes’ statements on the basis that this evidence was the product of an illegal arrest. We agree and, accordingly, affirm the order.
The charges against Stokes arose out of the robbery and fatal shooting of John J. Meehan at 1133 N. 63rd Street, Philadelphia, on July 1, 1976.
On August 14, 1976, Detective Terrence Gibbs was assigned primary responsibility for investigating Meehan’s death. That same day Detective Gibbs stopped a youth named Gregory Staulings on a street corner to ask if he knew anything about the Meehan Killing. Staulings told Detective Gibbs that, he had been told by another youth, one Anthony Ramsey, that David Stokes had told Ramsey that “he and some other guys had got a body up on 63rd Street.” Subsequently, Staulings gave a written statement at homicide headquarters.
[43]*43On August 15, 1976, Detective Gibbs dispatched Sergeant Richard Strohm to question seventeen-year-old Anthony Ramsey about the Meehan killing. At about 5:00 p. m., in the presence of his mother at their home, Ramsey confirmed Staulings’ information and added that Stokes had told him “they had shot the white man on 63rd Street when they were out to rob somebody and that the man died.” Further, Ramsey said that Stokes had asked him not to tell anyone. Ramsey and his mother were taken to police headquarters where Ramsey gave a statement which was signed by Ramsey and his mother.
Solely on the basis of the information provided by Gregory Staulings and Anthony Ramsey, Detective Strohm concluded there was probable cause to arrest Stokes.3 At 5:10 p. m., he radioed Detective Gibbs to make the arrest. At 5:15 p. m., Detective Gibbs and Officer Barlow went to Stokes’ residence where they arrested him without a warrant in the presence of his father and sister and, thereafter, transported him to homicide headquarters. Stokes’ subsequent oral and written statements admitting participation in the crime were ordered suppressed as the product of an illegal arrest.4
The law is clear that a warrantless arrest is not lawful unless there is probable cause therefor. McCray v. Illinois, 386 U.S. 300, 87 S.Ct. 1056, 18 L.Ed.2d 62 (1967); Ker v. California, 374 U.S. 23, 83 S.Ct. 1623, 10 L.Ed.2d 726 (1963); Commonwealth v. Johnson, 467 Pa. 146, 354 A.2d 886 (1976). Whether there is probable cause to arrest without a warrant depends on whether, at the moment a suspect is taken into custody, the facts and circumstances within the officer’s knowledge, and of which he has reasonably trustworthy information, are sufficient to warrant a man of reasonable caution to believe that an offense has been committed and that the person to be arrested has committed the offense. Commonwealth v. Johnson, supra; Common[44]*44wealth v. Jones, 457 Pa. 423, 322 A.2d 119 (1974); Commonwealth v. Mackie, 456 Pa. 372, 320 A.2d 842 (1974); Commonwealth v. Norwood, 456 Pa. 330, 319 A.2d 908 (1974).
Thus, in order to arrest without a warrant, the officer must have a reasonable belief in the probability of criminal activity by the person to be arrested. However, that belief need not be grounded in the officer’s direct, personal knowledge of the relevant facts and circumstances. It may, instead, rest solely on information supplied by another person where there is a “substantial basis” for crediting that information. United States v. Harris, 403 U.S. 573, 91 S.Ct. 2075, 29 L.Ed.2d 723 (1971); Jones v. United States, 362 U.S. 257, 80 S.Ct. 725, 4 L.Ed.2d 697 (1960); Draper v. United States, 358 U.S. 307, 79 S.Ct. 329, 3 L.Ed.2d 327 (1959).
This Court has held that information provided by certain classes of persons may be sufficient to establish probable cause. It is well-settled that the uncorroborated confession of an accomplice which implicates the suspect will supply the probable cause for a warrantless arrest. Commonwealth v. Johnson, 467 Pa. 146, 354 A.2d 886 (1976); Commonwealth v. Rush, 459 Pa. 23, 326 A.2d 340 (1974); Commonwealth v. Kenney, 449 Pa. 562, 297 A.2d 794 (1972); Commonwealth v. Bradley, 449 Pa. 19, 295 A.2d 842 (1972). See also Commonwealth v. Matthews, 446 Pa. 65, 285 A.2d 510 (1971). Similarly, the statement of a victim, identifying the perpetrator of a crime, has been found sufficient to establish probable cause for that person’s arrest. Commonwealth v. Hall, 456 Pa. 243, 317 A.2d 891 (1974). Further, information provided by an eyewitness whose identity is known has also been deemed sufficient. Commonwealth v. Carter, 444 Pa. 405, 282 A.2d 375 (1971); Commonwealth v. Crawley, 209 Pa.Super. 70, 223 A.2d 885 (1966). Cf. Commonwealth v. Mamon, 449 Pa. 249, 297 A.2d 471 (1972). Thus, in determining whether probable cause exists, we have tended to credit information supplied by one who has some direct personal knowledge of the crime.
[45]*45In the instant case, the arresting officer relied on information supplied by an informant who was neither an accomplice, nor an eyewitness, nor a victim of the crime. The information provided by Ramsey amounted to hearsay by one who had no first-hand knowledge of the crime.
It is well-settled that even hearsay information is sometimes sufficient to establish probable cause. See Draper v. United States, 358 U.S. 307, 79 S.Ct. 329, 3 L.Ed.2d 327 (1959). However, before an officer may conclude there is probable cause to arrest based on hearsay information, he must satisfy the two-pronged test of Aguilar v. Texas, 378 U.S. 108, 84 S.Ct. 1509, 12 L.Ed.2d 723 (1964), as explicated in Spinelli v. United States, 393 U.S. 410, 89 S.Ct. 584, 21 L.Ed.2d 637 (1969): (1) he must know the underlying circumstances from which the informer concluded the suspect participated in the crime; and, (2) he must have some reasonable basis for concluding that the informant is credible or that his information is reliable. See also Commonwealth v. Brooks, 468 Pa. 547, 364 A.2d 652 (1976). The Aguilar-Spinelli requirements are exacted in order “to assure that the tip is not merely an unsupported rumor” and “to reduce the possibility that [it] is merely a well-constructed fabrication.” In re Betrand, 451 Pa. 381, 386, 303 A.2d 486, 488 (1973).
The court below applied the Aguilar-Spinelli standard to the facts of this case and concluded there was insufficient evidence to establish fulfillment of the requirements of that test. We agree.
There is no indication in the record that Ramsey had any personal knowledge of the crime. Ramsey told Detective Gibbs that Stokes had admitted his participation to him. However, the story was conclusory and contained no detailed description of Stokes’ criminal activity. Moreover, the record is silent as to the circumstances under which Stokes’ admission was made and as to Ramsey’s relationship with Stokes which might have explained why Stokes would have divulged such self-incriminating information to him. But, [46]*46even assuming that the first requirement of the Aguilar-Spinelli test was met, the record is clearly deficient in regard to the requirements of the second prong of that test.
The record is devoid of evidence which could justify a reasonable belief that Ramsey himself was a credible person. Ramsey was not previously known to Sergeant Strohm or Detective Gibbs, and he had never before given information to the police. He did not come forward to report the crime as a disinterested citizen complainant, but, rather, he was sought out by the police more than six weeks after the crime to corroborate a story he had told to Gregory Staulings. Under these circumstances we cannot assume that he had no reason to falsify information or mislead the police.
Further, the record fails to include facts to support a reasonable belief that Ramsey’s information was reliable. Detective Strohm testified on direct examination that he asked Ramsey “what knowledge he had of the white man that was shot and killed on N. 63rd Street back in July, namely July 1st.” Ramsey responded that “David Stokes had told him that they had shot the white man on 63rd Street when they were out to rob somebody and that the man died.” Thus, the question posed by Detective Strohm partially suggested the answer which Ramsey gave. Therefore, the information cannot be considered reliable on the basis that it independently corroborated information already possessed by the police.
Accordingly, the second Aguilar-Spinelli requirement, viz., the credibility of the informant or the reliability of his information, was not met.
The Commonwealth contends the suppression court should not have applied the Aguilar-Spinelli standard in determining whether Detective Gibbs had probable cause to arrest Stokes. It argues, instead, the court should have used a “substantial basis” approach. See United States v. Harris, supra. Regardless of which methodology is employed, the object of a probable-cause analysis remains the same, viz., to [47]*47determine if the informant was trustworthy or his information reliable.
Using the proposed alternative approach, the Commonwealth maintains that Detective Gibbs had a substantial basis for crediting Ramsey’s information for the following reasons: (1) the informant was named and thus, amenable to process; (2) the information amounted to an admission by Stokes which would be admissible evidence and legally sufficient to convict, a fortiori the information was sufficient to establish probable cause; (3) the information was corroborated by the fact that Ramsey had told the same story to another named individual, Gregory Staulings. We have examined these reasons and conclude that they do not justify a finding of probable cause.
First, the fact that an informant is named is a factor to consider in determining whether probable cause exists, but that fact alone will not support a finding of probable cause. United States v. Spach, 518 F.2d 866 (7th Cir. 1975). While the federal courts have upheld findings of probable cause to arrest based on information by named persons, they have insisted upon corroborative evidence to support the information. United States v. Spach, supra; United States v. Wilson, 479 F.2d 936 (7th Cir. 1973); United States v. Unger, 469 F.2d 1283 (7th Cir. 1972), cert. denied, 411 U.S. 920, 93 S.Ct. 1546, 36 L.Ed.2d 313 (1973); United States v. Roman, 451 F.2d 579 (4th Cir. 1971). See also Commonwealth v. Whitehouse, 222 Pa.Super. 127, 292 A.2d 469 (1972).
Next, the Commonwealth reasons that since an admission would be legally sufficient to convict, it should, therefore, be sufficient to establish probable cause to arrest, since probable cause may be established by less evidence than would be sufficient to support a conviction. See Commonwealth v. Bradley, 449 Pa. 19, 295 A.2d 842 (1972). We acknowledge that an admission per se is inherently reliable evidence. However, an admission transmitted through an informant is only as reliable as its conduit is trustworthy. [48]*48Since the Commonwealth has not established the reliability of the source of its information, Stokes’ purported admission cannot serve as the basis for probable cause to arrest him.
Finally, the fact that Ramsey told the same story to the police that he had told earlier to Gregory Staulings cannot be considered as corroboration. When two independent informants supply the same information about a crime to the police, each source tends to support the reliability of the other. See Commonwealth v. Mamon, supra. In this case, however, the information came from only one source, Anthony Ramsey. The fact that Ramsey related the story to someone other than the police does not increase its reliability.
Order affirmed.
MANDERINO, J., did not participate in the consideration or decision of this case.
POMEROY and LARSEN, JJ., file dissenting opinions.