BOULDER, Colo.—A man accused of a mass shooting at a Colorado supermarket in 2021 pleaded not guilty by reason of insanity Tuesday as a judge ruled the case can move to a trial following testimony giving new details of how he killed most of the 10 victims in just over a minute using a gun with a high-capacity magazine.
Attorneys for Ahmad Al Aliwi Alissa entered the plea before District Court Judge Ingrid Bakke in Boulder. The plea means Mr. Alissa’s attorneys are claiming mental illness prevented him from understanding right from wrong on March 22, 2021, the day of the attack.
