Opening remarks began Wednesday in the federal terrorism trial for Noor Salman, the wife of the gunman.
The video also shows the moments before the SWAT team engaged Mateen in a gun battle.
It is the deadliest act of violence targeting LGBT people in United States history and was also the deadliest shooting by a single shooter in United States history until the Las Vegas Strip shooting on October 1, 2017.
Before the shooting, Mateen had been investigated for connections to terrorism by the Federal Bureau of Investigation (FBI) in 2013 and 2014. During that period, he was placed on the Terrorist Screening Database, but subsequently removed. In a call to 9-1-1 during the shooting, Mateen identified himself as “Mujahideen”, “Islamic Soldier”, and “Soldier of God”; and pledged his allegiance multiple times to Abu Bakr al-Baghdadi, the leader of the militant jihadist group Islamic State of Iraq and the Levant. He said the shooting was “triggered” by an airstrike in Iraq that killed Abu Wahib, an ISIL commander, six weeks before.