Susan Morton, 51, died of injuries she sustained in a head-on collision last week.
The second individual involved in the incident, Cyril Hubert, 79, is in critical condition at Scottsdale Osborne, according to Det. Matt Van Camp of the Payson Police Department.
During the investigation, Payson police determined that Morton was traveling westbound in the eastbound curb lane of Highway 260. Hubert was traveling eastbound in the eastbound curb lane and the two vehicles struck head-on.
There were no other passengers in the vehicles and both drivers were flown to the Scottsdale Osborne trauma unit.
The collision occurred at approximately 12:30 p.m., Wednesday, April 30 in the 2300 block of East Highway 260, near Payson Concrete.
The investigation of this collision is on going. It is undetermined at this time why Morton was in the eastbound lanes or if alcohol or drugs are involved. Sgt. Tom Tieman said the evidence is being reviewed at the Department of Public Safety laboratory in Phoenix.