EVERGREEN, Colo. — A new security measure is in place at Evergreen High School in the wake of a shooting last month that left two students critically injured, and this one has four legs.

Oak, a nearly 2-year old black lab, will be at the high school before class starts in the morning and when children return from lunch, according to Jefferson County Public Schools.

Oak is trained in firearm detection, using different oil to identify things like gun, ammunition and gun powder.

"If you're having to search a building, a school, anything for a particular odor or hazard, these dogs can get you in and out of there quicker, in a safer manner," Dalton Byers, Oak's handler and the owner of Byers K9 Services , said. K9 pilot program launches at Evergreen High School following school shooting

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