Frantic moment negotiators try calling Pulse shooter Omar Mateen

Frantic moment negotiators try calling Pulse shooter Omar Mateen 'He is gonna try to kill cops… He's not coming out:' Newly released 911 calls lay bare the terror and panic in the aftermath of Orlando Pulse nightclub shooting Calls released Monday reveal negotiators' attempts to call Omar Mateen Two employees can be heard discussing the shooter, saying he was 'sober' Keep trying to call in vain; one says Mateen has warned about more attacks Another call came from a woman whose sister was injured and bleeding Someone called about friend and brother-in-law were hiding in bathroom.