A 36-year-old San Tan Valley man, James David Walker, was arrested about 1 a.m. today in connection with shooting at six vehicles involving 13 victims, including a highway trooper, at about 8:30 p.m. Tuesday night on State Route 87, according to an Arizona Department of Public Safety spokesman.

None of the injuries was life-threatening. Walker will be booked later today in the Fourth Avenue Jail on charges of aggravated assault, endangerment, attempted homicide, armed robbery, theft of means of transportation and possession of dangerous drugs. Additional charges are pending.

The shootings began south of Shea Boulevard around 8:30 Tuesday night. After fleeing the scene, the gunman carjacked a patron at the Ba’ja convenience store across from Fort McDowell Casino before heading north on the highway. He later abandoned the car in a ditch.

Three hours later, Mesa Police Department’s helicopter found Walker lying on the ground in a fetal position. A SWAT team took him into custody. Outside the stolen car, troopers found an AR-15 rifle, numerous magazines of ammunition and body armor. The highway was closed for more than five hours.