Omar Mateen Once Caught on Hidden Camera for 2012 Documentary on BP Oil Spill

Orlando Gunman Called Local News Station During Attack: 'I'm The Shooter. It's Me'

Mom of Newtown Victim Pens Letter to Orlando Families: 'I Am Sorry Our Tragedy Wasn't Enough'

Trump Hits Out at Obama: 'He's More Mad at Me Than at the Gunman'

14-Year-Old Kalamazoo Survivor Abbie Kopf Knocked 'Back To Square One' After Infection

Orlando Shooter's Wife Knew He Planned To Attack Club, Tried To Talk Him Out Of It: Report

Tributes Pour in For Heroic Mom Who Died Shielding Her Son From Orlando Gunman

Omar Mateen's Wife Seen For First Time Returning Home Since Massacre

Orlando Gunman Jumped and Cheered During 9/11 Attacks, Former Classmates Say

Anderson Cooper Gets Emotional as He Reads Names of Orlando Massacre Victims