The Microscope Mystery (1916)

When a wealthy hypochondriac is dissatisfied by the care of the town doctor Doc Arnold he consults with a new physician in town who swindles him out of a large sum of money When his daughter tries to retrieve the check the quack Dr Bell turns up dead with a gun shot wound to the chest Doc Arnold lends his expertise to the investigation and solves the case by finding microscopic evidence on the murder weapon left at the scene