[Warning: Potentially Triggering Content] Dallas Cowboys fans and players are mourning the tragic loss of one of their own. Marshawn Kneeland, a defensive end for the team, passed away on Thursday morning. He was so young - only 24 years old. How heartbreaking. According to the Frisco Police Department, he was "found deceased from an apparent self-inflicted gunshot wound" following a police chase on Wednesday night. Police said that at around 10:33 p.m.