“ In response to the State's previous argument that 'there was no evidence to make any issue of voluntariness' and therefore there was no need to apply Jackson v. Denno, Mr. Justice Clark stated:
'We cannot agree. There was a definite, clear-cut issue here. Petitioner testified that Doctor Jackson physically abused him while he was in his office and that he was suffering from that abuse when he made the statement, thereby rendering such confession involuntary and the result of coercion. The doctor admitted that he saw petitioner on the floor of his office ”