SEATTLE - The suspect in a deadly shooting that took place at Seattle Pacific University in 2014 took the stand Monday in his trial.

Aaron Ybarra, 29, testified he thought God wanted to sacrifice and "show others of damage that goes on in the world." He said he told his brother that a voice of one the Columbine shooters "demanded and commanded me to do a massacre." He added that he drank so he wouldn't hear the voices and calm his nerves. Drinking "shut down the plan," he said.

Ybarra is accused of fatally shooting 19-year-old Paul Lee and wounded two others. Ybarra has pleaded not guilty by reason of insanity to first-degree murder and other charges in the case.

Charging papers say Ybarra scouted the campus before he returned on June 5, 2014, with the intent of committing a mass shooting he did not expect to survive.

His trial, now entering its fourth week, began Oct. 10 and is expected to last two months.

KING 5's Ryan Takeo is filling in for Elisa Hahn and following this week's developments in the trial. You can follow his updates on Twitter at @ryantakeok5 (App users can also click here to view his updates on Storify).

Previous coverage:

SPU Shooting Trial - Week 1 - Live blog by Elisa Hahn

SPU Shooting Trial - Week 2 - Live blog by Elisa Hahn

SPU Shooting Trial - Week 3 - Live blog by Elisa Hahn