A BLUEPRINT FOR MURDER 1953 & MAN IN THE ATTIC 1953 Psycho Killers DOUBLE FEATURE

A BLUEPRINT FOR MURDER 1953 - Whitney Cameron suspects his sister-in-law has poisoned his brother and niece, but without proof how does he prevent the murder of his nephew?
MAN IN THE ATTIC 1953 - After an enigmatic, self-described medical pathologist rents the attic room of a Victorian house, his landlady begins to suspect her lodger is Jack the Ripper.