Larry Crompton

Introduction to Larry Crompton

Larry Crompton is a retired detective from the Contra Costa County Sheriff's Department in California, recognized for his significant contributions to the investigation of the East Area Rapist (EAR) cases during the late 1970s. Later identified as part of the broader criminal activity of Joseph DeAngelo, the Golden State Killer, the EAR attacks terrorized communities across California with a series of rapes, burglaries, and eventually murders. Crompton's dedication to documenting and publicizing these crimes played a crucial role in maintaining public and law enforcement awareness of the case over decades, ultimately contributing to the eventual identification and arrest of DeAngelo in 2018 through forensic genealogy.

Role in the East Area Rapist Investigation

As a detective in Contra Costa County, Larry Crompton was directly involved in investigating a string of sexual assaults and burglaries attributed to the East Area Rapist between 1976 and 1979. During this period, the EAR was responsible for at least 50 rapes and numerous home invasions, primarily in the Sacramento area and surrounding counties, including Contra Costa. Crompton's work focused on piecing together evidence from crime scenes and victim testimonies to build a profile of the elusive offender. His meticulous documentation of these cases helped establish connections between seemingly disparate crimes across jurisdictions, a critical step in recognizing the scale of the perpetrator's activities. Although the suspect remained at large during Crompton's active tenure, his efforts laid foundational groundwork for future investigators.

Authorship of "Sudden Terror" and Legacy

After retiring from law enforcement, Larry Crompton authored Sudden Terror, published in 2010, which stands as one of the first comprehensive accounts of the East Area Rapist cases. Drawing from police reports, witness statements, and his own investigative notes, the book provided an in-depth look at the crimes and the challenges faced by law enforcement in tracking the offender. Sudden Terror not only chronicled the terror inflicted on victims but also highlighted the importance of inter-agency collaboration, as Crompton connected incidents across multiple California counties. His work helped keep the case in the public eye during periods when investigative leads had gone cold, inspiring renewed interest from both amateur sleuths and professional investigators. Crompton's documentation indirectly supported later breakthroughs, including the use of forensic genealogy that ultimately identified Joseph DeAngelo as the Golden State Killer. While Crompton did not directly collaborate with the team that apprehended DeAngelo, his contributions through detailed record-keeping and public advocacy remain a vital part of the case's history.