King County prosecutor, Dan Satterberg, said his office filed one count of first degree murder, two counts of first degree attempted murder and one count of second degree assault against 26-year-old Aaron Ybarra.
One person was killed and two others were wounded Thursday when police say Ybarra, armed with a shotgun, opened fire on the small campus in the heart of Seattle.
Following the shooting, police say a student security guard pepper sprayed Ybarra, wrestled him to the ground, and held him until officers arrived.
Ybarra is being held without bail at King County Jail. Authorities say he is on suicide watch. His lawyer says he has a long history of mental problems.
Investigators say Ybarra had at least 50 extra shotgun rounds and told officers he planned to kill as many people as possible and himself.