An autopsy revealed this week that Canadian backpacker Audrey Carey, killed in Golden Gate Park at the beginning of last year's Hardly Strictly Bluegrass Festival, had marijuana and methamphetamine in her system when she was shot to death. Her head and face were wounded, and a crime scene report indicates evidence of drug use, with clear baggies and lighters at the scene.

As the Examiner reports, the office of the San Francisco Medical Examiner also found green nylon rope around Carey's ankle. They discovered no wounds or bruises to her hands, indicating that she did not or was not able to defend herself with them.

The suspected murderers, a trio of drifters seen about Haight Street also stand accused of shooting and killing a noted tantric yoga teacher in Marin just days later with the same weapon. Morrison Haze Lampley, 23, Sean Michael Angold, 24, and Lila Scott Alligood, 18, have been in custody in Marin County Jail since they were apprehended in Oregon, fleeing in the yoga teacher's car. They next appear in court on May 9 and could face capital punishment.

"She wanted to travel," a relative of Carey's recalls. It "was her first trip.”

Previously: Alleged Golden Gate Park Killers Appear In Court, May Face The Death Penalty

Sean Michael Angold (l), Lila Scott Alligood (center), Morrison Haze Lampley (right) are accused of killing a Marin county man and a Canadian backpacker in SF.