Officers then spotted Labaki's vehicle about 2:40 p.m. speeding north on Highway 150.
Police said Labaki lost control at the Interstate 80 intersection, hit the sidewalk and spun in the opposite direction. An unmarked Evanston police vehicle rear-ended the vehicle, police said.
Police said Labaki, still inside his vehicle, pointed a rifle at a city police officer. Police and a Uinta County sheriff's deputy then shot him, police said.
Labaki was taken to Evanston Regional Hospital where he was pronounced dead.
Carrie Padilla, of Rock Springs, Wyo., said Sunday her family was in the parking lot at the McDonald's at 212 Front St. when the chase came to a stop kitty-corner to them.
She said she watched a deputy get out of his patrol vehicle and rapidly fire six or seven shots at the Explorer. She said the deputy was about five feet from the Explorer.
"He was shooting bullets like crazy," Padilla said. "He even shot the building behind the vehicle."
When the shooting stopped, she said officers pulled a man from the vehicle, laid him on the ground and rendered aid.
Padilla said she saw a rifle on the ground next to the vehicle but wasn't sure if it belonged to the man or police.
"I was very upset and crying," Padilla said. "We had just never seen anything like that."
She said a friend had told her that a white Explorer almost hit another vehicle head-on in a different part of Evanston about 30 minutes before the shooting.