Giant from the Unknown

Giant from the Unknown (1958) is a horror directed by Richard E. Cunha rated 4.4/10.

A series of grisly murders plague a small mountain community and the sheriff suspects a local scientist whom he dislikes. Together with a former professor and the professor's pretty daughter, the scientist sets about solving the crimes and discovers the killer is an oversized 16th century conquistador, resurrected by a lightning bolt from his mountain grave.