Arrest made in Denver cop shooting

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DENVER, June 25 (UPI) -- Denver police said Monday they arrested a 21-year-old man on suspicion of shooting a police officer to death at a weekly jazz concert in City Park.

Police arrested Rollen Oliver, 21, after finding a gun in his possession shortly after the Sunday shooting, police Chief Robert White said.

Oliver was being held in Denver's jail without bond and could face first-degree murder charges, The Denver Post reported.

Denver police officer Celena Hollis was shot in the head shortly after 8 p.m. while trying to break up a fight between two people. She was declared dead at a hospital.

Hollis was a seven-year veteran of the Denver police force who was originally from Detroit and was married with two children.

"She was easy to get along with and always had a smile on her face and happy to approach each day," said Lt. Ron Thomas, a board member of the Denver Black Police Officers Organization.

Police said they don't believe Oliver targeted and intentionally shot Hollis. They are investigating whether the man is a gang member and if the fight was gang-related.

The weekly City Park Jazz concert was a tribute to Charlie Burrell, a jazz bassist who also plays with the Denver Symphony Orchestra. Purnell Steen and Le Jazz Machine also performed.