Video of the shooting begins with the gunman driving to the mosque clad in tactical gear, his car full of weapons. It shows the shooting from his perspective - a chilling record of mass violence that police have warned people not to share. The shooter fires hundreds of rounds of bullets inside and outside Al Noor Mosque, where the majority of the bloodshed occurred, retreating at one point to his car for another weapon. He doubles back on injured victims to make sure they are dead. The violence lasts about six minutes.