Prosecutor Ken Kupfner loaded dummy bullets into a 30-round magazine in a hushed courtroom Friday morning. He slowly pushed each bullet into the magazine — the same type of magazine used by the man who carried out a mass shooting at a Boulder King Soopers grocery store in 2021,

Both the prosecution and defense presented closing arguments in the Boulder grocery store shooting trial on Friday.

Ahmad Alissa, who has schizophrenia, pleaded not guilty by reason of insanity for killing 10 people inside the supermarket in March 2021