LIVERMORE — An official says the two people arrested in the fatal stabbing of a Northern California woman found by a motorist on the side of a road were friends of the victim.

Alameda County Sheriff's Sgt. Ray Kelly on Tuesday identified the slain woman as 19-year-old Lizette Cuesta of Tracy, California.

Kelly says Cuesta willingly got in the car with 19-year-old Daniel Gross and his 25-year-old girlfriend Melissa Leonardo. He wouldn't discuss a motive in the killing because of the ongoing investigation.

Kelly says Cuesta identified the suspects before dying Monday at a hospital.

Motorist Richard Loadholt tells KCRA-TV that he and a friend found Cuesta on Monday soaked in blood and dragging herself on the side of a road in Livermore.