The 21-year-old Arvada man arrested in Monday’s mass shooting at a Boulder King Sooper’s previously attacked a classmate at Arvada West High School, according to court records and the Colorado Bureau of Investigation. Ahmad Al Aliwi Alissa is suspected of killing 10 people at the grocery store Monday when he walked in around 2:30 p.m. and began shooting, according to law enforcement. He was taken into custody about an hour later and was injured during the arrest. Alissa was hospitalized for treatment and is expected to be transported to the Boulder County Jail Tuesday to face 10 counts of first-degree...