FALLBROOK, Calif. -- A 25-year-old parolee was in custody Thursday on suspicion of fatally stabbing a man while robbing him of his backpack in Fallbrook, authorities said.

Travis Sean Hopkins allegedly stabbed to death 26-year-old William Baker at a Shell Gas Station parking lot in the 900 block of East Mission Road around 5:15 p.m. Wednesday, said Sgt. David Martinez of the San Diego County Sheriff's Department.

Hopkins and a female companion, identified as 25-year-old Carmina Marie Bunnel, fled the scene in a gray Honda Civic and were spotted by authorities traveling on westbound Highway 76 from South Mission Road about 15 minutes after the stabbing, Martinez said.

A car chase ensued and authorities eventually caught up with the couple in Oceanside, where Hopkins bolted from the Civic and fled on foot, although he was quickly caught with the help of a police dog, Martinez said.

Hopkins was booked into jail on suspicion of one count of murder, one count of robbery, and parole violation. Martinez said Hopkins was also named in a warrant alleging parole violation, but why he was on parole was not immediately reported.

Bunnel was detained after the car chase but later released, Martinez said.