Los Angeles Police detectives inspect a vehicle parked the wrong direction as they search the neighborhood below the Hollywood Sign after a plastic bag containing a human head was discovered Tuesday on a nearby trail in Los Angeles, Wednesday, Jan. 18, 2012. (AP Photo/Jason Redmond)
Los Angeles County coroner's investigator Rene Grand Pre walks a human-remains detecting K9 as police search the neighborhood below the Hollywood Sign after a plastic bag containing a human head was discovered Tuesday on a nearby trail in Los Angeles, Wednesday, Jan. 18, 2012. (AP Photo/Jason Redmond)
Los Angeles Police detectives investigate the neighborhood below the Hollywood Sign after a plastic bag containing a human head was discovered Tuesday on a nearby trail in Los Angeles, Wednesday, Jan. 18, 2012. (AP Photo/Jason Redmond)
A resident stops their car to speak with Los Angeles Police detectives as they search the neighborhood below the Hollywood Sign after a plastic bag containing a human head was discovered Tuesday on a nearby trail in Los Angeles, Wednesday, Jan. 18, 2012. (AP Photo/Jason Redmond)
Los Angeles Police detectives meet as they search the neighborhood below the Hollywood Sign after a plastic bag containing a human head was discovered Tuesday on a nearby trail in Los Angeles, Wednesday, Jan. 18, 2012. (AP Photo/Jason Redmond)
Los Angeles County coroner's investigator Rene Grand Pre, center, walks a human-remains detecting K9 around a vehicle as police search the neighborhood below the Hollywood Sign after a plastic bag containing a human head was discovered Tuesday on a nearby trail in Los Angeles, Wednesday, Jan. 18, 2012. (AP Photo/Jason Redmond)
Los Angeles Police detectives Jeff Sandefur, right, and Claudia Castruita stand at the entrance of Bronson Canyon Park as they search the neighborhood near the Hollywood Sign after a plastic bag containing a human head was discovered Tuesday on a nearby trail in Los Angeles, Wednesday, Jan. 18, 2012. (AP Photo/Jason Redmond)
Residents walk their dogs along Canyon Drive as Los Angeles Police detectives, center, investigate the neighborhood below the Hollywood Sign after a plastic bag containing a human head was discovered Tuesday on a nearby trail in Los Angeles, Wednesday, Jan. 18, 2012. (AP Photo/Jason Redmond)
Los Angeles Police Commander Andrew J. Smith, center, prepares to speak to media in front of the Bronson Canyon Park entrance as Los Angeles Police detectives search the neighborhood below the Hollywood Sign after a plastic bag containing a human head was discovered Tuesday on a nearby trail in Los Angeles, Wednesday, Jan. 18, 2012. (AP Photo/Jason Redmond)
Los Angeles Police detectives work a crime scene in Griffith Park off Canyon Drive after a human head was discovered off a nearby trail Tuesday by two women walking their dogs in Los Angeles, Wednesday, Jan. 18, 2012. A human hand has since been discovered. (AP Photo/Los Angeles Times, Al Seib, pool)
Los Angeles Police Commander Andrew Smith, second left, looks on as a coroner's vehicle arrives at a crime scene in Griffith Park off Canyon Drive where a human head was discovered Tuesday by two women walking their dogs in Los Angeles, Wednesday, Jan. 18, 2012. A human hand has since been discovered. (AP Photo/Los Angeles Times, Al Seib, pool)
Los Angeles Police Commander Andrew Smith, left, talks to Los Angeles Coroner Detective Rene Grand Pre in Griffith Park on Canyon Drive near the scene where a human head was discovered Tuesday by two women walking their dogs in Los Angeles, Wednesday, Jan. 18, 2012. A human hand has since been discovered. (AP Photo/Los Angeles Times, Al Seib, pool)
Los Angeles Police detectives work a crime scene in Griffith Park off Canyon Drive after a human head was discovered off a nearby trail Tuesday by two women walking their dogs in Los Angeles, Wednesday, Jan. 18, 2012. A human hand has since been discovered. (AP Photo/Los Angeles Times, Al Seib, Pool)
Los Angeles Police detectives work a crime scene in Griffith Park off Canyon Drive after a human head was discovered off a nearby trail Tuesday by two women walking their dogs in Los Angeles, Wednesday, Jan. 18, 2012. A human hand has since been discovered. (AP Photo/Los Angeles Times, Al Seib, Pool)
Los Angeles Police detectives work a crime scene in Griffith Park off Canyon Drive after a human head was discovered off a nearby trail Tuesday by two women walking their dogs in Los Angeles, Wednesday, Jan. 18, 2012. A human hand has since been discovered. (AP Photo/Los Angeles Times, Al Seib, Pool)
A hiker walks her dogs in Griffith Park near the Hollywood sign after a plastic bag containing a human head was discovered Tuesday by two women walking their dogs on a nearby trail off Canyon Drive in Los Angeles, Wednesday, Jan. 18, 2012. Investigators have since discovered a human hand. (AP Photo/Jason Redmond)
Two women hike in Griffith Park near the Hollywood sign after a plastic bag containing a human head was discovered Tuesday by two women walking their dogs on a nearby trail off Canyon Drive in Los Angeles, Wednesday, Jan. 18, 2012. Investigators have since discovered a human hand. (AP Photo/Jason Redmond)
A group of hikers walks their dog in Griffith Park near the Hollywood sign after a plastic bag containing a human head was discovered Tuesday by two women walking their dogs on a nearby trail in Los Angeles, Wednesday, Jan. 18, 2012. Investigators have since discovered a human hand. (AP Photo/Jason Redmond)
A hiker walks his dog in Griffith Park near the Hollywood sign after a plastic bag containing a human head was discovered Tuesday by two women walking their dogs on a nearby trail off Canyon Drive in Los Angeles, Wednesday, Jan. 18, 2012. Investigators have since discovered a human hand. (AP Photo/Jason Redmond)
Mounted Los Angeles Police officers search the Bronson Canyon area of Griffith Park after a human head was discovered Tuesday by two people walking their dogs below the Hollywood Sign in Los Angeles, Wednesday, Jan. 18, 2012. Investigators also found two severed hands. (AP Photo/Jason Redmond)
Mounted Los Angeles Police officers search the Bronson Canyon area of Griffith Park after a human head was discovered Tuesday by two people walking their dogs below the Hollywood Sign in Los Angeles, Wednesday, Jan. 18, 2012. Investigators have also two severed hands. (AP Photo/Jason Redmond)
Mounted Los Angeles Police officers search the Bronson Canyon area of Griffith Park after a human head was discovered Tuesday by two people walking their dogs below the Hollywood Sign in Los Angeles, Wednesday, Jan. 18, 2012. Investigators have also found two severed hands. (AP Photo/Jason Redmond)
ROBERT JABLON 01/18/12 09:13 PM ET Associated Press