A teen couple was held hostage for two days before the 17-year-old boy was killed and the 16-year-old girl was taken to a forest, where she was raped, shot in the jaw and left for dead, authorities said.

No arrests had been made.Chad MacDonald of Yorba Linda was found dead Tuesday afternoon in an alley in Los Angeles. An autopsy was being performed, authorities said Thursday.

A motorist found the girl, who was bloody and partially clothed, on Tuesday along Highway 39 in Angeles National Forest. She was in serious condition at County-USC Medical Center.