A Nevada Highway Patrol traffic stop at 3:55 p.m. Monday led to two carjackings, a rollover and finally a suicide.A trooper stopped a gray 2013 Ford Explorer at the Mustang exit on Interstate 80. One of the suspects, four were in the vehicle, exited the Explorer, stole the NHP trooper's vehicle and then drove east on Interstate 80. Other NHP troopers shot out the tires of the car. The suspect exited the NHP trooper's car and then, with the trooper's shotgun, stole a 2007 silver Pontiac Grand Prix, although the driver of the Grand Prix was unharmed, according to Trooper …