Man Arrested in Walmart Shooting Called Unfriendly and ‘Rude’
Mr. Valenzuela, who let reporters into the apartment, said
that he had gotten calls to fix Mr. Ostrem’s stove and plumbing in the two years he had lived in the apartment, and that Mr. Ostrem had once refused to let him in.
And on Wednesday night, the police said, Mr. Ostrem, 47, “nonchalantly” walked into a Walmart in this city of about 136,000 north of Denver
and fatally shot two men and a woman, then calmly turned around and drove off in a red Mitsubishi subcompact.
In a news conference on Thursday morning, Mr. Avila, the Thornton police spokesman, said that Mr. Ostrem did not have an extensive criminal history.
He was arrested Thursday morning after an all-night manhunt when he was spotted
driving by his Denver apartment, about seven miles south of the Walmart.
Investigators seized a rifle, cellphones, a safe, a camera
and other materials from Mr. Ostrem’s apartment in north Denver, where shattered glass and a copy of the search warrant’s bill of items littered his kitchen on Thursday afternoon.
