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Photo Gallery: 4/20 At Civic Center Park

Paul Vance

CBS4's Jennifer Brice talks with Sgt. AJ DeAndrea (credit: CBS)

Arvada Officer Trains Nation’s Police How To Approach Mass Shootings

After Columbine police changed the way they react to mass shootings like the Aurora theater massacre and the mall shooting in Portland. CBS4′s Jennifer Brice talked to a police sergeant who actually trained the police in Connecticut.

12/15/2012