MESA COUNTY – A Mesa County deputy suffered life-threatening injuries Monday morning after he was shot by a suspect he had detained as part of a weapons investigation.

The deputy, identified as Derek Geer, was shot multiple times. As of Monday night, he remained in the hospital with life threatening injuries.

It all started just after 11 a.m. Monday, when Mesa County deputies were dispatched to the 500 block of Fruitvale Court after a caller reported a suspicious person with a gun.

He was seen walking south, crossing the Interstate 70 business loop and the railroad tracks south of the road, according to the Mesa County Sheriff's Office.

Authorities say Geer confronted a 17-year-old who matched the description of the suspect. When the suspect was told he was being detained, the sheriff's office says he tried to flee – prompting Geer to use his stun gun.

The suspect then fired at Geer multiple times and ran away. Other deputies arrived and found Geer unresponsive. He was rushed to the hospital for treatment.

Meanwhile, law enforcement officers from every other agency in the area helped search for the suspect. He was taken into custody less than an hour later.

Since the suspect is under 18, he has not yet been identified.

The District Attorney's Office will determine if he is charged as an adult.

Geer is a Navy veteran who has been with the Mesa County Sheriff's Office since October 2001.

He is married and has two children.

The investigation into the shooting prompted multiple local schools to be placed on lockdown. 

(© 2016 KUSA)