All I remember of the movie is that a wealthy man died and his greedy relatives started trying to figure out where he hid his money. One by one his relatives were murdered seemingly by him after his death. His accomplice was living, but I can't remember who she was.
One family member got killed when she put cold cream on her face, it was filled with acid. Another (I thought for sure it was Roddy McDowall but can't find anything in his films that rings a bell) put on a suit that had just arrived and it squished him to death. His widow and another man were squished when the walls of the shower closed in on them while they were getting busy.
In the last scene, nearly everyone still living left the house except the accomplice who stayed behind, and had figured out where the vault was. The vault was waist high in a wall. She opened the first portion then had to crawl in to open in the inner wall which revealed all of his fortune. She crawled in to get the riches and the vault closed behind her. The dead man's voice came on in a recording and said something about her being able to spend eternity with all the riches she had wanted.
Does this sound familiar to anyone?