Both directions of the Interstate 17 have reopened after a deadly collision Saturday morning.
Bart Graves, spokesman for the Arizona Department of Public Safety, said one person died in a multi-vehicle crash along the I-17 at Thunderbird Road.
Graves said a Chevrolet Malibu crashed into the median along northbound I-17 at 5:21 a.m. A Mercury Cougar then ran into the Malibu and ejected the passenger in the Malibu over the median wall, he said.
The passenger in the Malibu was then run over by multiple vehicles traveling on southbound I-17 and died. DPS officials initially said the woman who died was the driver of the Malibu.
The driver of the Malibu remains hospitalized at John C. Lincoln Hospital and is expected to be charged with manslaughter.
Authorities said that they believe impairment is a factor in the crash.
Authorities said a good Samaritan in a red vehicle witnessed the crash, stopped his vehicle and ran across the interstate to render aid, but was struck by an oncoming black Chevrolet Suburban.
The Suburban initially left the scene, but later returned. Authorities arrested the driver, a 33-year-old man, who faces a charge of felony hit and run, Graves said Saturday night. ABC15 is not identifying that driver as he has not been charged yet.
Graves said the good Samaritan suffered a pelvic fracture and underwent surgery Saturday afternoon. The driver of the black SUV will be charged with felony hit and run, he said.
Graves said they're also looking for a second good Samaritan who stopped just moments after the original crash occurred.
Anyone who witnessed the collision is asked to call the Department of Public Safety at 602-223-2212.