Watch The Killer Is Loose for Free: How to Stream the Movie Online at 123Movies. . A savings-and-loan bank is robbed; later, a police wiretap identifies bank teller Leon Poole as the inside man. In capturing him, detective Sam Wagner accidentally kills Poole's young wife, and at his trial Poole swears vengeance against Wagner. Poole begins his plans to get revenge when he escapes his captors.