Paul Holes retired as a cold case investigator after spending over 27 years working for the Sheriff and District Attorney's Offices during his tenure in Contra Costa County, located in the Bay Area, California. Having experience in both forensic and investigative assignments, Paul throughout his career specialized in cold case and serial predator crimes, developing and applying investigative, behavioural and forensic expertise in notable cases such as Golden State Killer and Jaycee Dugard. Paul is frequently sought out by investigators to consult on the most complex and high profile cases.

As an FBI Task Force Officer while employed with the DA's Office, Paul teamed with FBI and Sacramento DA personnel to apply innovative technology that identified Joseph DeAngelo as the Golden State Killer, the most prolific serial predator in US history.

Since the arrest of DeAngelo, Paul has been very involved on the media side continuing to assist law enforcement and victims' families with their unsolved cases, through the television shows The DNA of Murder with Paul Holes and America's Most Wanted, and with the podcast Jensen & Holes: The Murder Squad.