Gun in Boulder Supermarket Shooting Bought 6 Days Earlier: Documents

Law enforcement officers sweep the area outside of a King Soopers grocery store, which was the site of a shooting in Boulder, Colo., on March 22, 2021. Kevin Mohatt/Reuters

The suspect in a mass shooting at the King Soopers supermarket in Colorado purchased a semi-automatic rifle just days before carrying out the attack, according to court filings.

Ahmad Al Aliwi Alissa, 21, bought a Ruger AR-556 pistol on March 16, Boulder detective Sarah Cantu said in an arrest affidavit (pdf).