Trooper First Class D. Wayne Smith of the Maryland State Police was the first to arrive at the scene and immediately used his light blue unmarked police vehicle to block off the exit by positioning the car sideways between two parked tractor-trailers. As more troopers arrived, they effectively sealed off the rest area at both the entrance and exit ramps without the suspects being aware of a rapidly growing police presence. Later, as truck driver Ron Lantz was attempting to exit the rest area, his tractor-trailer was commandeered by troopers who used the truck, in place of the police car, to complete the roadblock at the exit. With the suspects' escape route sealed off, the SWAT officers moved in to arrest them.