Police investigate source of synthetic marijuana

State police are conducting an investigation after three Branch County residents recently overdosed on synthetic marijuana.
According to a department media release, two incidents occurred Sunday in Ovid Township. One of the two men remains in critical condition at Borgess Hospital, the other was treated locally and released.
Meanwhile, a 22-year-old man overdosed Monday in Batavia Township. After he was treated at a local hospital, he was arrested for probation violation and possession of prescription narcotics.
Troopers are attempting to locate the source of the synthetic marijuana, also known as “spice.”