The Wonderland murders, also known as the Four on the Floor Murders or the Laurel Canyon Murders, are four unsolved murders that occurred in Los Angeles on July 1, 1981. Five of the six targeted to be killed in the known drug house on Wonderland Avenue were present, and four of the five died from extensive blunt-force trauma injuries: Billy DeVerell, Ron Launius, Joy Miller, and Barbara Richardson. Launius' wife, Susan Launius, survived the attack. The attack was allegedly masterminded by organized crime figure and nightclub owner Eddie Nash. Porn star John Holmes was arrested, tried, and acquitted for his involvement in the murders.

• http://en.wikipedia.org/wiki/Wonderland murders