The Golden and metro police communities are mourning the death of a Golden police officer who was killed while on duty Wednesday evening when he was thrown underneath a crashed vehicle that was parked on the side of the highway.

Officer Evan Dunn was pinned underneath a car and appeared to have died instantly. Golden police said that he had just graduated from the police academy in July.

The second Golden officer, Bethany Grusing, sustained a cheekbone injury, and two drivers who were involved in the earlier crash were also injured. Both were thrown by the impact and one sustained a skull fracture and brain bleed, the arrest document reported.

A Colorado School of Mines mechanical engineering professor was arrested and booked into the Jefferson County jail on suspicion of vehicular homicide/DUI, two counts of vehicular assault/DUI and driving under the influence, according to the Colorado State Patrol.

Stephen Geer, 43, appeared in Jefferson County court Thursday morning and was given a $250,000 bond with the condition of pretrial supervision.

Prosecutor Alexa Visscher argued that Geer refused a blood and breathalyzer test at the scene, but his wife, who is public defender, said that he is not a flight risk. “Our daughter asked to please bring daddy home,” she said. “He’s never harmed anyone.”

Geer appeared from a jail WebEx site in an orange inmate jumpsuit, his head down for much of the hearing.

The Colorado State Patrol said that a trooper, Dunn and Grusing were tending to a crash on Highway 58 near Washington Avenue in Golden just before 5 p.m. Wednesday when the incident happened.

One officer was in a police cruiser near the crash and Dunn and Grusing were managing the site when Geer, in a black Mazda ran into the car, forcing the two officers under the original vehicle, according to the arrest affidavit.