15-year-old Savannah Graziano, killed in Hesperia shootout, had been staying with father before mother's slaying in Fontana - KABC-TV

A man who was accused of killing his estranged wife in Fontana and abducting their 15-year-old daughter had been living with the teenager out of his pickup truck and hotels for weeks.

(KABC) -- A man who was accused of killing his estranged wife in Fontana and abducting their 15-year-old daughter had been living with the teenager out of his pickup truck and hotels for weeks before the violence, authorities said Wednesday.

Anthony John Graziano and his daughter, Savannah Graziano, were killed Tuesday in a shootout with law enforcement on a highway in the high desert after a 45-mile chase.

San Bernardino County Sheriff Shannon Dicus said Wednesday that evidence suggested the teenager was "a participant in shooting at our deputies.".

Neither parent was on probation or parole at the time and investigators believe Savannah was being home-schooled while she lived with her father, whom police said liked to camp out in the desert and mountains in his pickup truck.

On Monday, witnesses saw Martinez walking in Fontana when Graziano picked her up in his truck.

Martinez got out of the truck - potentially to escape - and Graziano opened fire on her with a handgun, striking her multiple times, Surgent said.

Throughout the pursuit, Graziano - and possibly his daughter as well - was "constantly shooting back at the deputies" with a rifle through the truck's rear window, San Bernardino County Sheriff Shannon Dicus said Tuesday during a news conference.

Although the only weapon found -- a rifle -- was in the truck with Graziano, detectives said it was possible that his daughter was also firing.