Military Spouse Kimberly O’Neal Found Murdered at Camp Pendleton Park; Marine Corps Gunnery Sgt. Archie O’Neil Jr. Sentenced to Life, No Parole (February 29, 2004)


Date: February 29, 2004
Victim: Kimberly O’Neal, U.S. Marine Corps Spouse
Offender: Archie O’Neil, Jr., U.S. Marine Corps
Location: Deer Park, Camp Pendleton, California
Circumstances: Archie O’Neil and Kimberly O’Neal engaged in a forbidden affair for a couple of years, before Archie was suppose to deploy to Iraq, they had one more tryst, Kimberly got angry when she learned Archie wasn’t going to leave his wife, Archie shot Kimberly O’Neal multiple times, during the investigation, Archie’s wife claimed Kimberly tried to run her down with her car but didn’t report it because no proof, Archie said he had severe headaches and shot Kimberly because she threatened to kill his family (most likely not true), Archie confessed to Kimberly’s murder but showed no remorse, charged with 1st degree premeditated murder, used PTSD defense to mitigate his crimes, defense claimed Archie had an abnormal startle response
Disposition: O’Neil sentenced to life in prison, no parole

Investigation Discovery:

ID Go: A decorated marine faces war at home when he falls for a married woman. Suspicion and jealousy plague their affair as they battle to keep their secret from their spouses but with the stakes so high it’s a truth they’ll stop at nothing to hide. -Love is War, Forbidden: Dying for Love (S4,E8)

Editor’s note: With a cable subscription, you can download the free ID Go app and watch all of the Investigation Discovery programming at your convenience. And for those who do not have cable, you can watch “unlocked” episodes on the ID Go app including the latest premieres. Download the ID Go app and binge away. For those who prefer commercial free programming during your binge session, Prime Video has an ID channel: ‘True Crime Files by Investigation Discovery” available for $2.99 a month. It’s a compilation of older seasons but totally worth the cost if you are a true crime addict.

Related Links:
Marine held in Kuwait for Calif. shooting
Marine Charged With Shooting Death on Base
Marine faces murder charges in Pendleton slaying
Trial continues for Marine accused of murder
Trial continues for Marine accused of murder 2
Defense: Stress triggered shooting
Verdict: Guilty, sentence stalled
Across America, Deadly Echoes of Foreign Battles 2008
Major NYT piece on homicides by Iraq and Afghanistan veterans
Gunnery sergeant gets life without parole
The War Within | Los Angeles Magazine
Love is War | Forbidden: Dying for Love | Investigation Discovery (S4,E8)
Love is War | Forbidden: Dying for Love | Investigation Discovery (website)
Love is War | Forbidden: Dying for Love | Investigation Discovery (Amazon)
Violent Crime, Non Combat Death, and Suicide at Camp Pendleton, California (US Marine Corps)

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