A 29-year-old man has been convicted of viciously beating a Denver Police officer after he was seen wandering into traffic and washing his clothes in a storm drain near Interstate 25.

A Denver jury convicted Stephen Hamper on multiple counts Wednesday after a two-day trial. He was found guilty of first degree assault causing serious bodily injury, two counts of second-degree assault of a peace officer and criminal attempt to disarm a peace officer for the September 2014 attack.

Court documents say it all started when Thompson tried to handcuff Hamper on a ramp to southbound I-25.

As Thompson tried to get him out of the road, prosecutors say Hamper turned around and punched her in the face, before breaking loose and rushing toward her patrol car.

He then turned back around and hit her several times, knocking her down. He proceeded to get on top of her and tried to grab her gun.

Two people driving by saw the attack and intervened, KUSA TV reports.