A 25-year-old Millis man faces multiple charges — including illegal possession of prescription drugs and having an open container of alcohol in the car — in connection with a crash that hospitalized five people, including rookie Patriots linebacker Harvey Langi and his wife, Cassidy.Kevin M. Conroy, 25, is charged with possession of a Class E substance, negligent operation of a motor vehicle, a marked lane violation, and possession of an open container of alcohol, according to Foxboro police Chief William Baker.