NBC's Pete Williams reports the suspected gunman in the Orlando nightclub shooting, Omar Mateen, made a 911 call beforehand and swore allegiance to ISIS leader Abu Bakr al-Baghdadi.June 12, 2016
UP NEXT
Pulse shooting survivor applauds NY AG suing to dissolve NRA
01:49
FL Gov. backtracks after omitting LGBTQ reference in proclamation on the Pulse shooting
09:43
LGBTQ activist on community's growing safety fears in Trump era
06:11
Parkland survivor: I appreciate candidates that voice opinions on gun control
09:52
Widow of Pulse nightclub shooter not guilty on all counts