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District Attorney - News

Posted on: August 27, 2020

Four Men Sentenced for Throwing Chlorine Bomb at Police

(Golden, CO -- August 27, 2020)  Sentencing was held on August 26, 2020 for three of four men convicted of throwing a chlorine bomb at an Arvada Police officer as he attempted to clear a road hazard. The hazard was built by the defendants to create a stationary target for their bombs.

On April 7, 2019 at 10:00 p.m., Arvada police received a call from a citizen regarding a road hazard at 72nd and Beech Street. The Officer arrived to find that street signs had been pulled out of ground and stacked in middle of the road, then plastic wrap had been strung across the road. The Officer and the citizen began to attempt to clear the road barricade when a plastic bottle was thrown and landed near the Officer. He overheard someone yell obscenities at him. When the bottle hit the ground it began releasing heavy chlorine gas. The Officer began coughing, became nauseous, lost consciousness, and fell to the ground. Other officers and paramedics arrived and the Officer was transported to the hospital.

They detonated at least seven additional incendiary devices in the area.

Arvada Police officers addressed the judge at the sentencing hearing, describing the impact this had on the officer, the entire department, and the community. During the immediate search for the offenders, a Code Red was issued for a one-mile radius in Arvada. 

The officer suffered serious pulmonary damage and spent months going to medical appointments and missing work and continues to suffer the effects of the chlorine gas.  

“These men set up an ambush for police. When the first Arvada officer arrived to clear away the road hazard, he was a fixed target for their toxic chemical bombs,” said DA Pete Weir, “These young men purchased the chemicals and plastic bottles at Walmart, mixed the bombs and then set up their targets for ambush. The impact on the law enforcement community has been enormous.”

Gavin Dawson

Gavin Beret Dawson, DOB: 10/5/99, was sentenced to probation for two years, with 60 days in the jail’s Alternative Sentencing Program, which includes jail work release and in-home detention. He pled guilty on May 18, 2020 to Attempted Second Degree Assault of a Peace Officer - Toxic Caustic Device (F5).

Maxwell McCann

Maxwell Cade McCann, DOB: 4/14/00, was sentenced to probation for two years, with 60 days in the jail’s Alternative Sentencing Program, which includes jail work release and in-home detention.

He pled guilty on May 18, 2020 to Attempted Second Degree Assault of a Peace Officer - Toxic Caustic Device (F5).

Braiden Ulmer

Braiden John Ulmer, DOB: 3/6/00, was sentenced to probation for two years, with 30 days in the jail’s Alternative Sentencing Program, which includes jail work release and in-home detention.

He pled guilty on May 18, 2020 to Attempted Second Degree Assault of a Peace Officer - Toxic Caustic Device (F5). 

Isaac Koch

Isaac Carl Koch, DOB: 3/28/00, pled guilty on December 9, 2019 to Conspiracy to Possess and Explosive/Incendiary Device (F5) and was granted a two-year deferred judgement and sentence.


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