The Perry High School shooter was armed with a pump-action shotgun, a revolver, a knife and an improvised explosive device. He wounded four students and two staff members and killed one student, the school principal,

The shooter's online activity before the attack is under thorough investigation in order to determine a motive.

The shooter responsible for two deaths and multiple injuries at an Iowa high school earlier this year “likely displayed warning signs” according to a detailed report from state officials released Friday.

A January school shooting at Perry High School near Des Moines, Iowa, which left two dead and six injured, was “the product of significant preparation and planning,” by a lone shooter, a new report released by the Dallas County Attorney’s office found.

The investigation into a deadly shooting at a small-town Iowa high school in January reveals new details, including that the teenage shooter sought fame and attempted to livestream his actions

Dylan Butler's attack at Perry High School lasted 4 minutes and 21 seconds. Here's a look at the newly released timeline of the events Jan. 4.

A report on a deadly shooting at a small-town Iowa high school in January reveals new details, including that the teenage shooter attempted to livestream his actions.