A Chicago Dunkin’ Donuts employee was busted after a police officer took the lid off his coffee and made a troubling discovery in his cup. The Garfield Ridge neighborhood Dunkin’ Donuts on Chicago’s Southwest Side (Photo Credit: Screenshot) Vincent Sessler, a 25-year-old Dunkin’ Donuts employee, was arrested after he decided to add a little something extra to a state trooper’s cup of coffee. Sessler likely hoped the cop would drink the contamina…