The United States Supreme Court has held that absent both a showing of cause for failure to make a timely objection and a showing of actual prejudice, a state prisoner's failure to comply with a state statute requiring that objections to the introduction of illegally obtained confessions must be raised at or prior to trial precludes federal habeas corpus relief on a subsequent claim that the confession was coerced.
Wainwright v. Sykes, 433 U.S. 72 (1977).
Gary J. Gushard,
Federal Courts - Habeas Corpus - State Prisoner - Waiver of Constitutional Right - Coerced Confession,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol16/iss3/8