Time Stamps0 Seconds : Shooter Videoed Running Across Roof Of AGR Building1 Minute 1 Seconds : Shooter Identified & Police Notified Of Shooter On Roof By Civilians Beside AGR Building2 Minutes 52 Seconds : Shooter Opens Fire3 Minutes 08 Seconds : Shooter Thomas Crooks Neutralized After Killing 1 & Injuring 3 Including President Trump