OPINION OF THE COURT
Aрpellant, Christopher Jackson, was indicted for murder, aggravated robbery, conspiracy and carrying a con *672 cealed deadly weapon. Pre-trial motions to suppress appellant’s statements were unsuccessful, and, after a trial by jury, appellant was found guilty of murder in the first degree and aggravated robbery. Post-trial motions in arrest of judgment and for a new trial were filed and denied, and аppellant was sentenced to concurrent terms of imprisonment for life and from five to ten years. From those sentences these appeals followed. 1 We reverse.
At approximately 9:30 p.m. on July 11, 1972, Kаrl Klaiss, Sr., an off-duty railroad detective, was walking north on 56th Street in Philadelphia, Pennsylvania. As he neared the intersection of 56th and Ludlow Streets, two youths approached him from behind. Moments later onе of the youths shot Mr. Klaiss four times. They then fled through a. driveway that connected 56th Street with 57th Street. Coincidentally an off-duty policeman, standing one-half block away, and two officers in a patrolling pоlice van, just entering 56th Street from Chestnut Street, heard the shots and watched the assailants flee. Two of these three policemen, Officers Pourran and Ricks, gave chase but were forced to abandon the footrace — one due to a chronic back injury and the other to render assistance to the victim.
From the officers’ observations and that of two additional witnesses, a description of the assailants was flashed over the police radio. The suspects were described as two Negro males in dark clothing, 5'6" to 5'8" in height, with medium builds, medium to dark complexions and semi-bush haircuts. 2
*673 Apprоximately one hour and one block from the scene of the crime, Officer John Clinkscale, patrolling in a squad car, observed a black youth receiving money from an elderly man. The man was baсking away and Officer Clinkscale suspected a robbery. He stopped his car, approached the pair and asked the man if anything was wrong. The man responded in the negative. Officer Clinkscale then noticed that the youth, the appellant herein, matched the physical description of the suspects to the slaying of the previous hour. Officer Clinkscale noted, however, that aрpellant wore light colored trousers and no shirt rather than the described dark clothing. Nonetheless, based on the remaining similarities, Clink-scale arrested the appellant.
After taking the appellant into custody, Clinkscale proceeded one-half block and arrested four other youths who also matched the description. 3 Appellant and the others arrested in connection with the slaying were taken to police headquarters. Appellant was placed in a detention room with the other suspects until the police commenced his interrogation approximаtely six hours after his arrest. Shortly thereafter appellant confessed.
Appellant raises several grounds for reversal, only one of which we need consider. He primarily contends that the аrrest was without probable cause and that, therefore, his confession should have been suppressed as a product of the illegal arrest.
Any arrest must be based on probable cause U.S.Cоnst, amend, iv;
McCray v. Illinois,
The Commonwealth argues that probable cause for appellant’s arrest
as a murder suspect
existed because the officer observed the appellant engaging in an apparent shakedown. Since the victim was also subjected to such a shakedown, the Commonwealth contends the arrest was justified by the combination of description and modus operandi. Nowhere, however, does the record of the trial reveal that the' arresting officer was aware that the slaying occurred in the context of a robbery. The officer testified at both the trial and the suppression hearing that he initially stopped the appellant to investigate his suspicious activity,
as a separate and distinct occurrence.
Only after he had satisfied himself that nothing was amiss did he notice the appellant’s similarity with the broadcast description. Since the facts known to the arresting officer “at the moment the arrest is made” determines the legality of the arrest,
Adams v. Williams,
We have consistently held that descriptions equally applicable to large numbers of people will not support a finding of рrobable cause.
See Commonwealth
*675
v. Berrios,
We now turn to the question of whether appellant’s confession must be suppressed as a product of the illegal arrest. The Commonwealth rightfully argues that the confession need not be excluded if it is “purged of the primary taint.”
Wong Sun v. United States,
*676
Lapse of time in itself cannot make a confession independent of an illegal arrest.
See Commonwealth v. Bishop,
We have also clearly held that
Miranda
warnings, administered before an accused has confessed, cannot purge the statement of the taint of unconstitutional arrest.
Betrand Appeal,
We find, therefore, the confession to be a fruit of the initial illegality, and as such should have been suppressed. Since the confession was the only evidence presented at trial which linked appellant to the slaying,
*677
its admission cannot be harmless.
Chapman v. California,
Judgments reversed.
Notes
. Jurisdiction of the appeal of the conviction of murder is based on Section 202(1) of the Appellate Court Jurisdiction Act of 1970, 17 P.S. § 211.202(1). The appeal of the conviction of aggravated robbery was transferred to this Court after first being properly filed in the Superior Court. See Appellate Court Jurisdiction Act of 1970, Section 503(c), 17 P.S. § 211.503(c).
. Although some dispute exists as to the bases of this description, we have assumed for purposes of this opinion that it was founded on legally sufficient sources.
. In all, fifteen to twenty youths who matched the description were arrested within the first few hours after the slaying.
. The facts surrounding this arrest also demand that we reiterate our condemnation of “dragnet” arrests.
Commonwealth
v.
Brown,
. The trial court in its opinion accepted these propositions relying on
Commonwealth
v.
Fogan,
. “There are two factors which seem to be of major significance in determining the relationship between an illegal arrest and, as here, the subsequent confession: (a) the proximity of an initial illegal custodial act to the procurement of the confession; and (b) the intervention of other circumstances subsequent to an illegal arrest which provide a cause so unrelated to that initial illegality that the acquired evidence may not reasonably be said to have been directly derived from, and thereby tainted by, that illegal arrest.” (Emphasis added)
Commonwealth ex rel. Craig
v.
Maroney,
