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District Attorney - News

Posted on: April 15, 2019

Charges Filed in Arvada Chlorine Bomb Discharge

Braiden Ulmer

District Attorney Pete Weir announced that charges have been filed in the April 7th incident in Arvada, in which a chlorine bomb was discharged near a police officer who was attempting to clear debris from the roadway.

Four men have been charged according to their alleged participation: Braiden Ulmer, DOB: 03/06/00; Gavin Dawson, DOB: 10/05/99; Isaac Koch, DOB: 03/28/00; and Maxwell McCann, DOB: 04/14/00. All four men have posted bond and appeared in court on April 12 to be advised of their charges.


Braiden Ulmer        

On April 7, 2019 Arvada Police were dispatched to the area of 72nd and Beech Street on a traffic complaint in the area. According to the arrest affidavit, the officer arrived and found street signs had been pulled out of the ground and laid down across the street in a pile, creating a barricade. He also found clear plastic wrap had been strung across the road around the signs. A civilian, who had previously called 911, arrived at the scene and was helping the officer clear the debris from the road. The officer observed a plastic bottle, which had been thrown, landing in the roadway 15 yards from where he was standing. The bottle began shrinking and released a “ton” of white-colored smoke. A short time later, the officer lost consciousness suffered other symptoms from breathing the gas. He was transported to the hospital. He was diagnosed with suffering chlorine gas exposure. The civilian also suffered minor symptoms but was treated at the scene.

The investigation led to the arrest of the four named males and one juvenile male who has also been charged according to his alleged participation.

Mr. Ulmer, Dawson, and McCann have preliminary hearings set for May 10 at 10:30 a.m. in Division J. Mr. Koch has preliminary hearing set on May 10 at 11:00 a.m.

Gavin Dawson

       Gavin Dawson

Isaac Koch

          Isaac Kock

Maxwell McCann

        Maxwell McCann

The filing of a criminal charge is merely a formal accusation that an individual has committed a crime. A defendant is presumed innocent until and unless proven guilty. See Colo. RPC 3.6

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