Investigators have yet to determine what drove an active-duty U.S. Army soldier to rent a Tesla Cybertruck and drive it to the Trump International Hotel in Las Vegas, where he appeared to shoot himself in the head before the vehicle exploded on New Year’s Day.Las Vegas Sheriff Kevin McMahill identified 37-year-old Matthew Livelsberger of Colorado Springs, Colorado as a person of interest in the matter, though he would not go as far as to say with 100% certainty that he is a suspect until DNA matches the remains of a body that was in the Cybertruck with Livelsberger.At about 8:40