San Quentin (1946)

The warden of San Quentin State Prison takes three of his best-behaved model prisoners to a press event in San Francisco, but one of them, Nick Taylor, escapes en route. The warden enlists an old enemy of Taylor's, Jim Roland, to bring him back to justice. The film comes with a prologue with former Sing Sing warden Lewis E. Lawes advocating the inmates' Mutual Welfare League.