A 25-year-old Des Plaines man with a long history of traffic violations was driving 108 mph and under the influence of drugs when he caused a fatal crash last month that killed a husband and wife and their son in Mount Prospect, police and prosecutors said. Garrett Kowalski, of the 500 block of North Third Avenue, was charged last week with three counts of reckless homicide, three counts of aggravated driving under the influence of drugs and possession of a controlled substance, Ketamine, in the March 7 crash in Mount Prospect, according to the Cook County Stateâs attorneyâs office. Kowalski appeared in court Friday and was being held in Cook County Jail in lieu of $800,000 bail Tuesday morning, according to records.