SACRAMENTO, Calif. (AP) _ The severed head, hand and organs of a missing man were found in boxes stashed in a car parked in a downtown alley, authorities said.

Timothy Roger Sugars, 27, whose apartment borders the alley where the remains were found, was arrested and booked on a murder charge, authorities said. He was being held without bail.

Police withheld the name of the victim, reported missing Thursday, pending notification of relatives.

Authorities said they found the body parts Sunday when they responded to reports of gunshots and a woman's scream, which apparently were unrelated to the killing. Officers said a foul odor was coming from the trunk of the victim's car, in which Sugars was installing a stereo.