An arrest warrant affidavit details the final moments of a Riverside police officer and the wounding of his partner, both the presumed random targets of Christopher Dorner, who is believed to have killed four people, two of them police officers.

A witness to the shooting told Riverside police detectives Greg Rowe and Rick Cobb he was stopped at a red light at the intersection of Magnolia and Arlington avenues, in Riverside, about 1:30 a.m. on Feb. 7 when a police car pulled up alongside his vehicle and stopped for the red light, according to the affidavit obtained Wednesday.

The witness, according to the court document, said he saw a camoflauge-colored truck pull up beside him. The driver of the truck, which the witness described as a heavyset black man in his 30s or 40s wearing a longsleeve camoflauge jacket, pointed a rifle with a camoflauge stock and a black barrel at the police car and fired approximately 10 shots. He then saw the police car start to roll forward, its driver slumped over.

The driver of the police car was later identified as Riverside Police Officer Michael Crain, who was pronounced dead at the hospital. His partner, Andrew Tachias, suffered multiple gunshot wounds to both his arms, according to the affidavit.


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Just seconds before the Riverside shooting, an all points bulletin was sent to the Riverside Police Department warning that Dorner was suspected of shooting at the two Los Angeles police officers in Corona, and was last seen headed east on Magnolia Avenue, toward Riverside, in a Nissan Titan pickup, according to Detective Rowe's two-page affidavit.

The Los Angeles police officers were in Corona after a citizen there, a suspected target of Dorner's, called police after seeing the news reports on television, according to the affidavit.

Responding to Corona, the Los Angeles police officers spotted Dorner's pickup on Wiereck Road and followed him. When they got to the area of Magnolia Avenue and the 15 Freeway, Dorner exited his truck and fired multiple shots from a .223-caliber rifle, grazing one of the officers in the head and missing the other. He got back into his truck and fled east on Magnolia Avenue, according to the affidavit.

Only nine minutes lapsed between the time Dorner allegedly shot at the two Los Angeles police officers and the time he allegedly shot the two Riverside police officers, according to the affidavit.

Another witness, a cab driver, told the detectives he was stopped at the intersection when he spotted a dark gray Nissan Titan pickup pull up next to him. He said he then heard about eight gunshots, a short pause, then several more shots before the police car started rolling into the intersection, its windows shot out, Rowe said in his affidavit.

The cab driver exited his vehicle and went to assist the ambushed officers. He opened the door of the police car, reached in and put the vehicle in park. Tachias could not move his arms due to his wounds and told the cab driver to key the police car's microphone so he could ask for help, the affidavit said.

Investigators located 13 .223-caliber bullet casings in the intersection with two different manufacturers. The casings and their manufacturers matched the casings located at the scene of the Corona shooting, according to the affidavit.

The shootings preceded a weeklong manhunt for Dorner, a former Los Angeles police officer fired in 2008 for allegedly falsifying a report that a fellow officer assaulted a suspect while in custody. Dorner alleged in a chilling manifesto that he was set up, and vowed to exact revenge by bringing "unconventional and asymmetrical warfare to those in LAPD uniform whether on or off duty."

Dorner, who is also suspected in the shooting deaths of Monica Quan and her fiance Keith Lawrence at an Irvine condominium complex on Feb. 3, died following a shootout with San Bernardino County sheriff's deputies and U.S. Fish and Wildlife officers on Feb. 12 in the Seven Oaks resort area of the San Bernardino Mountains. An autopsy concluded he died from a single gunshot to the head.

Quan was the daughter of retired LAPD Capt. Randal Quan, the first Chinese-American captain the department's history.

joe.nelson@inlandnewspapers.com, 909-386-3874