Dead Are Alive / Let Sleeping Corpses Lie (1972)

In The Dead Are Alive (1972), a photographer on an archaeological expedition digging up Etruscan ruins in Italy begins to suspect that not all the Etruscans buried there are actually dead. In Let Sleeping Corpses Lie (1974), a cop chases two hippies suspected of a series of Manson family-like murders; unbeknownst to him, the real culprits are the living dead.