Rollin Oliver, shooting suspect in the death of Denver police officer Celena Hollis, to stand trial for murder

This undated photo provided by the Denver Police Department shows veteran Denver Police Officer Celena Hollis. Hollis was shot and killed during a free jazz festival, Sunday, June 24, 2012, in Denver. A suspect, Rollen Oliver, was taken into custody late Sunday after witnesses gave a description of the gunman. Police also recovered a gun and said they believe Oliver was the only person involved in the attack. Police Chief Robert White said investigators were not sure if Hollis was the target of the shooting when she answered a call about a disturbance in the park.
AP Photo/Denver Police Department
Denver Police Officer Celena Hollis was shot and killed during a free jazz festival on June 24
AP Photo/Denver Police Department

(CBS/AP) DENVER - Rollin Oliver, a Colorado man, will face trial in the fatal shooting of Denver police officer Celena Hollis during a free jazz festival at City Park last summer.

A judge ruled Thursday there's enough evidence to put Oliver, 21,  on trial in first-degree murder with extreme indifference in the death of Hollis, who was off duty but in uniform as she tried to break up a confrontation at the park on June 24.

Investigators said four bullets found at the scene were linked to a gun found with Oliver. William Drexler, Oliver's public defender, said shots were fired as Oliver left the park after suspected members of the Crips gang flashed gang signs.

He said Oliver purchased a gun after he was shot at a party in an unrelated incident.

Complete coverage of the Celena Hollis case on Crimesider