Father of Orlando Nightclub Shooter Attends Hillary Clinton Rally

The father of Omar Mateen stood behind Clinton during rally in Florida Monday.

The Clinton campaign said today in a statement, "The rally was a 3,000-person, open-door event for the public. This individual wasn't invited as a guest, and the campaign was unaware of his attendance until after the event."

The event was held not far from the site of the shooting.

Clinton visited a memorial outside Pulse last month during a trip to Orlando, where she held a roundtable to discuss gun violence.