The fate of a gunman now rests in the hands of a 12-person jury, who are tasked with determining not if he committed the heinous act, but whether he was legally insane when he drove to a Boulder, Colorado grocery store and opened fire, killing 10 people on March 22, 2021.

Jurors begin deliberating whether a mentally ill man is guilty of murder in a Colorado supermarket mass shooting or not guilty by reason of insanity.

Lawyers are set to deliver closing arguments in the trial of a mentally ill man who shot and killed 10 people at a Colorado supermarket in 2021.