Un alibi per morire (1962)

Paul loves Margaret but she has her eyes on Graziano, a night-club owner. Desperate to prove himself to Margaret, Paul begins planning an elaborate robbery. With the assistance of a corrupt prison officer he gets himself arrested, knowing he can come and go from the jail as he pleases, thus providing him with the perfect alibi. The robbery is a success but the prison guard changes his mind and decides he now wants all of the haul for himself, so he shoots Paul, fatally wounding him but, just before he dies, Paul fires one last round and kills the prison guard.