Gregory Lowell Linn RESOLVED Linn, circa 1987 Missing Since 05/04/1987 Missing From Garden Grove, California Classification Endangered Missing Age 44 years old Height and Weight - Distinguishing Characteristics - Details of Disappearance Linn disappeared from Garden Grove, California on May 4, 1987. His body was found in Riverside County, California in December 1989, but it wasn't identified until April 2008. Further details are unavailable. Investigating Agency - Source Information The Doe Network . .