This is from the Arizona Department of Public Safety website.
They are very vague on the details regarding how the suspect was killed.

News RELEASE

DPS Trooper wounded following shooting in the west valley



Thursday, January 12, 2017 -

Contact PIO


At around 4:00 a.m., State Troopers responded to milepost 89 westbound along I10 for reports of shots fired. Upon arrival, one of our Troopers, a 27-year veteran, located a roll-over collision in the area.



Our trooper was ambushed and shot by a suspect in the immediate area. A physical fight ensued and as a result the suspect was shot and killed.



An occupant of a vehicle that rolled-over in the same area was ejected and pronounced deceased at the hospital.



We have not confirmed the identification of the suspect or the occupant of the vehicle that was ejected.



State detectives are conducting the investigation.



We do not have an estimated time for reopening the highway.



The Arizona Department of Public Safety is a state-level law enforcement agency whose mission is to protect human life and property by enforcing state laws, deterring criminal activity and providing vital support to the State of Arizona and its citizens.

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Stay protected my friends.