Terribly sad.   A Treeper, CR,  family member was at the event and confirms the shooter was  a black male, however no police confirmation yet….. and you know the media will avoid like the plague.
COLORADO – A female police officer was shot and killed Sunday night during Denver’s popular City Park Jazz scene, sending hundreds of people fleeing as shots were fired.

The officer was shot in the head while breaking up a fight just as the music ended. She was taken to a hospital, where she was declared dead.
As many as 30 police cars were reported on the scene near the boat house. Multiple people were questioned, and dozens of officers continued to scour the area, including the nearby Denver Zoo.
At a late-night news conference, Mayor Michael Hancock asked for residents of Denver to give the Police Department their prayers and said the city mourned the loss of a single mother and a tremendous leader.
Hancock said Denver was still “a safe city” and that he wouldn’t let a few people destroy summer events attended by thousands of people — including his wife and children.
“We will not surrender this city to anyone,” he said.
Chief Robert White said one person, who possessed a gun, was in custody but that the person had not been confirmed as a suspect.
“We will know about that tomorrow,” he said.
Sometime after 8 p.m., multiple shots were fired. The chaotic scene was one of confusion as fleeing people shouted, “They’re shooting over there.”
Crowds seated southwest of the pavilion reacted slowly at first, but as people began rushing by from the other end of the park, chaos erupted. Many people tripped, and lawn chairs and blankets were abandoned.
The slain officer was originally from Detroit and was a seven-year veteran of the police force.
Sunday night’s concert was a tribute to Charlie Burrell, a jazz bassist who also plays with the Denver Symphony Orchestra. The concert also featured Purnell Steen and Le Jazz Machine.  (article)