UPDATE: Valley teen found guilty of murdering girlfriend

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Man and another suspect turned themselves in

The following news release was sent by the County Attorney's Office:

GLENDALE - County Attorney Andrew Thomas announced today that Phoenix resident Marcus Damper, 19 (DOB 1/3/89), has been found guilty of murdering his 19 year-old girlfriend. The charges stem from the shooting death of the victim on January 21, 2008 at a Glendale apartment that the two shared. The body was discovered by the mother and father of the defendant. Damper was charged with Second Degree Murder, a class one dangerous felony, on January 29, 2008. The guilty verdict was returned on November 6, 2008.

According to a Glendale Police probable cause statement, the defendant's mother received a phone call from a male subject stating that something had happened in her son's apartment. She and her husband traveled to the apartment and discovered the victim lying on the bed with blood on her head. Police responded to their 911 call and found that the victim had been shot in the face. On January 26, 2008, police received a call from a friend of the defendant's stating that Damper and a second man, a roommate of Damper and the victim, was with him. Both Damper and his roommate, who was in the apartment at the time of the shooting, were taken into custody. During an investigation, a text message was found on the victim's cell phone asking for a friend to pick her up as she and Damper were arguing.

"The tragic death of the victim is a sad reminder of the dangers associated with domestic violence," said Thomas. "I commend the jury for returning a verdict that delivers justice for this terrible crime." Damper will be sentenced on December 19, 2008, in the courtroom of Judge Gary Donohoe. He faces a maximum prison term of 23 years for the murder charge. Damper was also found guilty of a misconduct involving weapons charge, as he was on probation at the time of the shooting.

Deputy County Attorney Zach Murphy is prosecuting the case.