(CNN) — 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 report, which outlined the timeline of events, also noted the victims of the shooting appeared to have been chosen “based on immediate availability,” rather than being targeted and that the 17-year-old shooter, Dylan Butler, had likely displayed “warning signs” that went unrecognized or unreported.
“The evidence suggests his actions that morning were indiscriminate and driven by a desire to commit suicide with the hostile intent of taking others with him,” the report states.
Butler entered the school through the main entrance, concealing the weapons he was carrying, and hid inside a student bathroom for about 20 minutes, until the school started to fill up with students and staff. At that point, he emerged and started …