There was a somber note to the start of Thursday night’s game between the Broncos and Raiders. Denver held a moment of silence for Cowboys defensive end Marshawn Kneeland, who was found dead Thursday morning from a self-inflicted gunshot wound following what authorities say was a police chase in Frisco, Texas. He was 24. “Ladies and gentlemen, the Denver Broncos join the Dallas Cowboys and the entire NFL community in mourning Cowboys defensive end Marshawn Kneeland, who tragically passed away