Concurring Opinion by
Mr. Justice Roberts :I concur in the majority’s result. Appellant has failed to demonstrate that the allegedly coerced confession was the primary basis for his guilty plea. His oral admissions, and the Commonwealth’s witnesses who saw him at the bar, provide a reservoir of evidence which could have motivated the plea independently of the challenged confession. Cf. Commonwealth v. Baity, 428 Pa. 306, 237 A. 2d 172 (1968); Commonwealth v. Garrett, 425 Pa. 594, 229 A. 2d 922 (1967).