Investigators Detail Chemical Device Attack On Police Officer

ARVADA, Colo. (CBS4) - New details were released in the investigation of a chemical device being thrown at an Arvada police officer. Five people were arrested, four of whom are young adults. The fifth suspect is a juvenile.

(credit: CBS)

Police reports state the officer responded to a call about traffic signs stringed together with plastic wrap. There was a plastic bottle among the debris.

(credit: CBS)

Investigators say one of the suspects yelled at the officer and threw another bottle at him and a bystander who had called 911 to report the signs.

The bottle started to emit smoke, the officer smelled chlorine and passed out.

Gavin Dawson (left) and Isaac Koch (right) (credit: CBS)

While investigating, officers found a Walmart receipt in a field which listed the items used. They were able to find the teenagers afterward.

Maxwell McCann (left) and Braiden Ulmer (right) (credit: CBS)

The four adults were identified as 19-year-olds Gavin Dawson, Isaac Koch, Braiden Ulmer and 18-year-old Maxwell McCann. They were officially charged with possession of a chemical, biological or radiological weapon, among other charges.

Both the officer and the bystander are expected to be okay.

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