We were doing most of the asking,' Mina said. 'He really wasn't asking for a whole lot. Orlando P olice C hief John Mina said that Mateen appeared 'cool and calm' throughout the attack. In a press conference on Monday, Orlando police said that they spoke with Mateen at least three times over the course of several hours on Sunday morning. We had a lot of information from the inside and they independently were saying, 'Yes, the bomber is about to put on an explosive vest,'' Dyer said. 'We had independent verification of that. Mateen was shot and killed after shooting at the entering officers.ĭuring the course of the shootout and subsequent standoff, Mateen told police negotiators that he planned to put explosive vests on four hostages and place them in corners of the nightclub, Dyer said. The threat prompted the Orlando Police Department to storm Pulse. Omar Mateen, the gunman who attacked a gay nightclub in Orlando, Florida, early on Sunday morning and killed at least 49 people, threatened to put bomb vests on his hostages, Orlando Mayor Buddy Dyer said at a press conference on Wednesday. Police cars and fire trucks outside the Pulse nightclub in Orlando, Florida.