Sergeant Ryker (1968)
Sergeant Ryker is a film directed by Buzz Kulik. It stars Lee Marvin and Bradford Dillman. The film was originally broadcast as a two-part episode The Case Against Paul Ryker of 1963's Kraft Suspense Theatre. It was released as a feature film in 1968 to capitalise on Marvin's popularity from The Dirty Dozen. Its second run paired it as a double feature with Counterpoint.
More at Wikipedia.