FAIRFIELD, Calif. (KTVU/BCN Wires) -- A person of interest in the theft of a vehicle that contained a sleeping 8-year-old boy in Fairfield early Monday morning is in custody on unrelated offenses, police said.
The boy, Brock Guzman, was found safe around 8:10 a.m. inside his parents' silver Toyota Corolla that was taken while it was warming up in the driveway of the family's home around 4:45 a.m.
The California Highway Patrol and Fairfield police issued an Amber Alert for the stolen vehicle -- a silver 2001 Toyota Corolla with license plate number 5BWF072 -- at around 4:45 a.m.
The mother had left her car running as she ran into her home.
"We got a call from the mom saying her vehicle was stolen and her child was in the back," said Fairfield police officer Kathryn McCormick.
McCormick said it appears to be a random act and not someone who knew the woman.
"It appears to be a crime of opportunity," she said. "The suspect walked by, saw the car running and drove away. Hopefully, they did not even know Brock was in the backseat asleep."
The suspect was initially identified as wearing a black hat and black sweatshirt, police said. Officers also found a bicycle next to the home where the boy went missing and said it may have been connected to the suspect.
Fairfield police said the boy was in good condition and was reunited with his parents.
"He is perfectly fine," McCormick said. "As far as I know he was still asleep when officers arrived."
McCormick said a local resident spotted the vehicle parked on a street about two miles from the home. The suspect had fled the scene.
Police had no other details on the person of interest who had been taken into custody.