The Wonderland murders, also known as the Four on the Floor Murders[1] or the Laurel Canyon Murders, are four unsolved murders that occurred in Los Angeles on July 1, 1981.[2] It is assumed that five people were targeted to be killed in the known drug house of the Wonderland Gang,

Wikipedia article on wonderland murders

Note Laurel Canyon

Paranormies have pointed out Laurel Canyon's relation to the music industry and psychological operations and the United States Military