Deriek Crouse , 39 , was killed Thursday conducting traffic stop on the Virginia Tech campus . The officer who shot and killed him said he believed his life was in danger because of a gun that had been stolen from him. Crouse shot while he was in his police vehicle , then shooter later killed himself . Crouse , a U.S. Army veteran , had been on Virginia Tech police force since 2007 .
Deriek Crouse , 39 , was killed Thursday conducting traffic stop on the Virginia Tech campus . Authorities : Crouse shot while he was in his police vehicle , then shooter later killed himself . Crouse , a U.S. Army veteran , had been on Virginia Tech police force since 2007 .