Derek Edwin Allen RESOLVED Allen, circa 1986 Missing Since 01/01/1986 Missing From Los Angeles County, California Classification Endangered Missing Age 22 years old Height and Weight - Distinguishing Characteristics - Details of Disappearance Allen disappeared from Los Angeles County, California on January 1, 1986. His body was found in Riverside County, California in July 1986, but it wasn't identified until February 2010. Further details are unavailable. Investigating Agency - Source Information Riverside County Sheriff's Department . .