A Dallas police officer covers his face as he stands with others outside the emergency room at Baylor University Medical Center, Friday, July 8, 2016, in Dallas. Snipers opened fire on police officers in the heart of Dallas on Thursday night, killing some of the officers. (AP Photo/Tony Gutierrez)

Dead Dallas gunman identified, says he acted alone

DALLAS (AP) — The dead gunman in the Dallas ambush that left five officers dead has been identified as 25-year-old Micah Xavier Johnson of M…