The Man from the Diners Club (1963)
An employee at Diners Club issues a credit card to a well known mobster and has to retrieve it in order to keep his job
De Mortuis (1956)
Professor Rankins buddies Wally and Bud stop by to take him fishing They find him in his cellar, filling in a hole with cement They suspect he may have also filled it with his wife
Decoy (1956)
Gil Larkin is suspected of murder when Mona Camerons allegedly abusive husband is shot dead in front of him and he gets knocked out by an unknown assailant