[Sciutto:] We have new details today on the investigation into the massacre at a gay nightclub in Orlando. That is just moments away. But first, it is a day of mourning. One more day of mourning in Orlando. Heartbroken families and friends are gathering to say their final good-byes. Five funerals today honoring victims of the rampage at the Pulse nightclub. Cory James Connell, Joel Rayon Paniagua, Luis Vielma, Stanley Almodovar III and Antonio Davon Brown. They're all being laid rest today in separate private ceremonies. Right now, some victims wounded in the attack or still fighting to stay alive. Here is the update from the Orlando Regional Medical Center. Nineteen injured people remain hospitalized, four of them still in critical conditions. Three victims in guarded condition. Twelve of the wounded are in stable condition. Since the attack, surgeons there have performed some 54 operations to try to help these victims recover. Now, on to the investigation. The FBI is questioning a friend who called the Orlando shooter during the rampage, while it was underway. We know the two discussed at the time medication. But it is not clear whether the friend knew that the massacre was underway. Also new evidence suggests that the killer made financial provisions for his family in the weeks leading up to the attack. And he bought his wife a very expensive piece of jewelry. I want to bring in Ed Lavandera, he's covering the investigation today from the ground in Orlando, Florida. Ed, we hear the FBI is now scrutinizing what could be a crucial clue from inside the nightclub. Tell us what they have in their hands now.
[Ed Lavandera, Cnn Correspondent:] Right. A crucial piece of evidence. And it's probably excruciating to watch. But it is surveillance video from inside the Pulse nightclub. And as rain falls here in Orlando, those investigative teams continue to work the scene. This area still blocked off to traffic as investigators have mobilized here in this block. And they continue to do the forensic work inside of that nightclub gathering all the clues and evidence that they can possibly gather. And one of the key ones we are learning about today is that surveillance video. Jim, it is hard to imagine that this kind of video would ever see the light of day. But investigators need to take a look at that video to kind of see for themselves exactly how everything played inside that nightclub during those horrific three hours last Sunday morning.
[Sciutto:] So, Ed, we are learning now about the killer's spending habits in the weeks leading up to the attacks. I mean, it looks like he was making preparations to die.
[Lavandera:] Right. Investigators have been saying that this wasn't an attack that was quickly carried out or was a spur of the moment decision by Omar Mateen to attack this particular nightclub last Sunday morning. And they point out to a series of clues, evidence like having visited this area, driven up to this area in the weeks leading up to the attack as well. Looking at financial documents in the family that Omar Mateen had changed bank accounts to include his wife's name on those accounts as well as documents related to his life insurance policy as well as the thousands of dollars that he spent on the weaponry that was used in the weeks leading up to this attack as well as you mentioned off the top there buying a very expensive piece of jewelry for his wife as well. So, the point to all of those clues as evidence that this was a premeditated attack.
[Sciutto:] Premeditated mass murder. Ed Lavandera in Orlando right from the scene there. Next live, in the CNN NEWSROOM. The Orlando shooter pledged his allegiance to ISIS in the middle of that bloody massacre and he warned of fresh ISIS attacks upcoming on the U.S. soil. Coming up, we'll talk about the terror group's ability to inspire often troubled young men without even speaking to them or contacting them.