Mounted police officers search the Bronson Canyon area of Griffith Park in Los Angeles on Wednesday, Jan. 18, 2012, after a human head was discovered Tuesday by two people walking their dogs below the famous Hollywood sign. (AP Photo/Jason Redmond)

Photo by: Jason Redmond

Mounted police officers search the Bronson Canyon area of Griffith Park in Los Angeles on Wednesday, Jan. 18, 2012, after a human head was discovered Tuesday by two people walking their dogs below the famous Hollywood sign. (AP Photo/Jason Redmond)