jim cavanagh, stay with us, we will be coming back to you. i want to keep you informed. this is orlando, and this is the scene we are looking at at orlando, where there was a shooting at 2:00 a.m. this morning and the shooter has confirmed to be dead and there was roughly 150 people in the nightclub and we are getting details as to what happened. stay with us, and we will be back after a short break and we will go live to orlando. why do so many businesses rely on the us postal service? because when they ship with us, their business becomes our business. that's why we make more e-commerce deliveries to homes than anyone else in the country. here, there, everywhere. united states postal service priority: you ♪ experience the thrill of the lexus gs f sport. because the ultimate expression of power, is control. this is the pursuit of perfection. poallergies?reather. stuffy nose? can't sleep? take that. a breathe right nasal strip instantly opens your nose up to 38% more than allergy medicine alone. shut your mouth and say goodnight, mouthbreathers. breathe right. thope to s

jim cavanagh is an nbc news law enforcement expert. jim, good morning. last time we talked the police estimate was that approximately 20 people were dead in this terrible shooting in orlando. we now know that number has grown to 50. 50 people killed inside the building. 53 more sent to area hospitals, some of them critically injured in that shooting. you heard the press conference that we just listened to from multiple law enforcement agencies. how has this story changed for you in the last hour or so? >> well, when the mayor said 50 people, willie, it just knocks you off your chair because what happens is this guy goes in there, filled with hate. no matter the motive, filled with hate and wants to kill all these people and his objective is mass murder. and he has an ar-15 rifle, multiple magazines. we don't know how long or how big the magazines he had. but a standard magazine is 30 rounds and you can shoot that off just as quickly as you can pull the trigger, 30 seconds or left so when he -- he has an advantage because he's laying in ambush inside a cl

. >> a chilling eyewitness account, and i want to bring back jim cavanagh who is an msnbc analysts. >> as sarah reported on the scene earlier, when you heard the explosion and the gunfire that followed and then you reported the ambulance leaving the scene, and that was s.w.a.t. most likely making an explosive entry or using a diversion airy devi device, and now they are moving quickly to get the wounded and that's what we are seeing with the ambulances leaving. orlando police s.w.a.t. looks like, has, you know, made entry, either killed the suspect or wounded them or the police may have killed himself after he was shot by police, and they are reporting the assailant is dead. that's critical for everybody now and now they can get the wounded treated, and s.w.a.t. will open the doors and get the paramedics in and get the wounded moved out of there, unless it's an obvious fatality, people will be treated by the paramedics. and then we are in a long crime scene processing. finding out who is the person or persons and what were they doing this for? is it a revenge or hate motive, a terrori