BPittMURDER011812_01-fullarrow.jpgBPittMURDER011812_04-fullarrow.jpgmurder coroner brad pitt

A human head in a plastic bag and a severed hand were found in Bronson Canyon Park near a hiking trail below the Hollywood sign Tuesday afternoon, and the crime scene happens to be down the street from Brad Pitt's home.

Investigators combed the Canyon Drive neighborhood looking for clues and speaking to neighbors ... including Brad Pitt's personal bodyguard.

Close to 30 detectives and a cadaver dog were seen investigating in the rough terrain. The hand was located 50 yards from the head.

Many celebrities, like Brad Pitt and Angelina Jolie, take their kids to play at Bronson Canyon Park.

The search is ongoing for the remaining parts of the male body. As for the severed head, police believe it belongs to a man of Armenian descent in his 40s with salt and pepper hair.

Police believe the man's identity will be uncovered using fingerprints and dental records.