Author: DENNIS HUSPEN, JULIA CARDI, OLIVIA PRENTZEL

The man accused of gunning down 10 people at a Boulder King Soopers on Monday purchased a Ruger AR-556 firearm just days before the shooting, according to an arrest affidavit released Tuesday. Ahmad Al Aliwi Alissa, 21, of Arvada, was arrested about 3:30 p.m. Monday at the King Soopers on Table Mesa Drive. He faces 10…