Odessa and Midland, Texas, mass shooting

An Odessa, Texas, police officer escort bystanders away from an area investigated for a shooting Aug. 31,following a deadly shooting. Several people were dead after a gunman who hijacked a postal service vehicle in West Texas shot more than 20 people, authorities said Saturday.   (Jacy Lewis/AP)

A man prays outside of the Medical Center Hospital Emergency room in Odessa, Texas, on Aug. 31, following a shooting at random in the area of Odessa and Midland. Several people were dead after a gunman who hijacked a postal service vehicle in West Texas shot more than 20 people, authorities said.   (Associated Press)

Odessa and Midland, Texas, police and sheriff’s deputies surround the area behind Cinergy in Odessa on Aug. 31, after reports of shootings.   (Tim Fischer/AP)

Law enforcement officials process a scene Sept. 1 involved in the shooting in Odessa, Texas. Bullet holes are visible near the car door handle. Authorities said they still could not explain why a man with an AR-style weapon opened fire during a routine traffic stop in West Texas to begin a terrifying rampage.  (Associated Press)