Timothy Walker, 35, has been upgraded from critical to serious condition, in his recovery from what police say is a self-inflicted gunshot wound.

Before shooting himself, police say he shot and killed Draper Police Sgt. Derek Johnson, 32...and shot and injured his girlfriend, Traci Vaillancourt, 34.

Authorities say Vaillancourt has also been upgraded -- from critical to fair condition -- and has been interviewed by police.

She is now considered a victim and not a suspect.