The Wonderland murders, also known as Four on the Floor or Laurel Canyon Murders, are four unsolved killings that occurred in Los Angeles on July 1, 1981, when four people were killed in a drug-related scenario involving porn star John Holmes and was allegedly masterminded by Eddie Nash.

The Wonderland Gang was centered around the occupants of a rented townhouse at 8763 Wonderland Avenue in the Laurel Canyon section of Los Angeles: Joy Audrey Gold Miller, William R. DeVerell (Miller and DeVerell were a couple), David Lind, and leader Ronald Launius. All four were involved in drug use and drug dealing.

On June 28, 1981, the group met with friends Tracy McCourt and John Holmes, a porn star and known drug addict. They had decided to rob the home of Eddie Nash, née Adel Gharib Nasrallah, another drug dealer and wealthy owner of several Los Angeles-area night clubs. Holmes, whom Nash had befriended, visited the house, ostensibly to buy drugs. While at Nash's home, Holmes unlocked a back door; he then left Nash's home and reported back to the Wonderland gang.