Sources: Christopher Dorner Reported the Gun Recovered in 'Crime Tourist' Case Stolen

Christopher Dormner, the notorious spree killer and former LAPD cop whose gun was recovered during a raid on a Santa Monica AirbNb stash house rented by South American watch thieves who terrorized a tourist in Beverly Hills for his $1 million watch in Beverly Hills, reported that pistol stolen, Los Angeles has learned.

The firearm, described in a federal criminal complaint as a "Glock 21 .45 caliber handgun, bearing serial number HAZ636," was "a privately-purchased pistol," a law enforcement source with direct knowledge of the case, told Los Angeles. It had been reported stolen by Dorner while he was still a uniformed officer and before he went on a killing rampage in early 2013, the sources said. The date of the Dorner's report was not immediately known.

At a meeting Tuesday morning with the Police Commission , LAPD Chief Dominic Choi was asked about several high-profile crimes in Los Angeles, including the brazen gunpoint watch heist on the patio of the Four Seasons Beverly Wilshire hotel where a British tourist visiting with his wife and twin daughters had a pistol pointed at his head by professional thieves who ripped a million-dollar watch off his wrist.

It was the second terrifying gunpoint watch theft in Beverly Hills that the duo, visiting from South America as "crime tourists," pulled off in a single week this month, federal prosecutors said . A spokesperson for United States Attorney Martin Estrada declined to comment on the origin of Dorner's gun Wednesday.

Choi said that the weapon was not Dorner's LAPD issued firearm. "I want to say that this weapon was not a city owned weapon, and it was not his duty weapon," the Chief told the Commission.

The weapon was part of an extensive gun collection investigators learned Dorner had stashed away before he went on a shooting rampage in early 2013, killing four people while leading investigators on a days-long manhunt that ended when he shot himself to death in a Big Bear cabin after a ferocious firefight with Riverside County Sheriff's Department deputies.

The killing rampage was sparked after Dorner was fired in 2008 after an LAPD review board found he had falsely accused his training officer of excessive force. Dorner held that his termination was retaliation from an endemically racist police department and his rampage was an attempt to clear his name.

Prior to the shootings, Dorner, a Navy veteran and reservist, unleashed his fury in a manifesto he addressed "to America," detailing who he planned to kill and why. It read in part:

"I'm not an aspiring rapper, I'm not a gang member, I'm not a dope dealer, I don't have multiple babies momma's. I am an American by choice, I am a son, I am a brother, I am a military service member, I am a man who has lost complete faith in the system, when the system betrayed, slandered, and libeled me. I lived a good life and though not a religious man I always stuck to my own personal code of ethics, ethos and always stuck to my shoreline and true North. I didn't need the US Navy to instill Honor, Courage, and Commitment in me but I thank them for re-enforcing it. It's in my DNA."

He then shot 28-year-old Monica Quan and her fiancé, 27-year-old Keith Lawrence in Irvine. Quan was the daughter of a LAPD Captain at the time. Days later he executed Riverside police officer Michael Crain, 34. Jeremiah MacKay, a 35 year-old San Bernardino County sheriff’s deputy, was killed in a gun battle with Dormer.