Maryland State Police are investigating a trooper's actions in a traffic stop where the trooper ripped out a driver's window with his bare hands and pulled the driver out of the car.The incident unfolded on Route 4 near Dunkirk during a traffic stop on May 7, but the driver posted his recording of the stop Wednesday.In the driver's video, the trooper almost immediately asks the driver to get out of the car. The driver asks why he needs to get out of the car and argues that point back and forth with the trooper for nearly five minutes.