Mohamed Soliman, the man accused of attacking a group of people in Boulder holding a weekly walk calling for the release of Israel hostages, had sprayed gasoline on himself before allegedly hurling Molotov cocktails into the crowd.
He told authorities he "had planned on dying."
An affidavit detailed how Soliman allegedly prepared for and carried out the attack that injured 12 people on Sunday afternoon near 13th and Pearl streets during a "humanitarian walk" for hostages being held by Hamas in the war with Israel.
Soliman left his house that morning and drove to a gas station, a Target and a Home Depot in Castle Rock, gathering supplies to make Molotov cocktails, said authorities, who told officials he had been planning the attack for a year.
At 1 p.m., Soliman arrived at Pearl Street