(KGW) The man who killed two people and wounded another Oregon's Clackamas Town Center bought more than 100 rounds of ammunition in the days before the December attack.
That information is in a 926-page report the Clackamas County Sheriff's Office released Wednesday.
Investigators said 22-year-old Jacob Tyler Roberts, of Portland, was the lone suspect in the the murders of Steven Forsyth and Cindy Yuille, and the attempted murder of Kristina Shevchenko on December 11, 2012, said Clackamas County Sheriff Craig Roberts.
"All evidence consistently indicates that the suspect acted alone," Roberts said. "The suspect died at the scene as a result of a self-inflicted gunshot wound."
The report shows he wore a hockey mask and carried an AR-15 semi-automatic rifle when he opened fire.