Investigators said the officer was on his way to a call of shots fired at a vehicle at about 4:20 a.m. when he encountered a rollover accident.
A state trooper has been shot in Tonopah, Arizona, a few miles west of Phoenix.
The crash consisted of four cars, including one of a State Trooper’s that was transporting a prisoner.
The trooper’s identity has not been released but authorities said he is a 27-year-old veteran. During an altercation at the scene, the trooper was shot through the shoulder. Col. Frank Milstead said the man witnessed the suspect slamming the trooper’s head into pavement.
The officer was putting out flares when the suspect opened fire and then physically attacked the wounded trooper, Milstead said.
The trooper will undergo surgery to fix a severe wound to his right shoulder, but it “looks like he will be okay after some recovery”, Milstead tweeted. A woman appeared to have been ejected from the vehicle and later died, according to local reports.
According to Milstead, a man traveling westbound on I-10 with his wife in the vehicle, pulled over to help the trooper.
The passerby then used the trooper’s radio to report the incident and call for help.
In a news conference from the hospital where the trooper is being cared for, Milstead thanked the man who stopped to help.
The Arizona Department of Transportation said all traffic is exiting at Bethany Home and drivers should consider an alternative route.
It was too early to know whether the motorist will face any charges in connection with the shooting, said department spokesman Bart Graves.
However, the suspect ignored the Good Samaritan’s orders to stop attacking the trooper.
No word on when the interstate will reopen.