Crosstrap (1962)

Geoff and his wife rent an isolated countryside bungalow to enable Geoff to finish his latest book without any distractions. Upon their arrival, they see a dead man in the property and before they can report the discovery they are confronted by a gangland boss, and his henchmen who have been using the empty property as a hide-out for stolen valuables, and more...

https://www.imdb.com/title/tt0179743