January 2, 2018
Officer Sean R. Bigler reacts during a candlelight vigil at Mission Hills Church on Monday, Jan. 1, 2018, for Deputy Zackari Parrish, 29, in Littleton, Colorado. (Dougal Brownlie/The Gazette via AP)
Stories this photo appears in:
Colorado authorities were contacted with concerns about the mental health of Matthew Riehl more than a month before he shot and killed a deputy and wounded four others.