Here's what we know about the gunman Omar Mir Seddique Mateen:1. Omar Mir Seddique Mateen, 29, was a New York-born American citizen who lived in Port St. Lucie, Florida. His father, Mir Seddique told NBC news that his son became angry when he saw two men kissing in Miami several months ago. FBI first became aware of Mateen in 2013 when he made inflammatory comments to co-workers alleging possible terrorist ties. His ex-wife spoke of a difficult marriage in which he was abusive and violent, and suggested he may have been mentally unstable.

Source: Times of India June 13, 2016 05:07 UTC