and you'll continue to do so. stay close, if you can, to that camera. we're going to come back to you. who is like all of our reporters getting information in the time that they're not on tv. tom winter from nbc news investigative unit is doing the same thing. tom, he brings up a point that has to be brought up every time we do this. who is this? is this a lone wolf? were they inspired by isis oral al qaeda or are they actually connected? you're actually doing some of that work for at least the beginning stages to find out who we think this is and what happened. >> sure. so we do have a name. and we're holding that name back for one reason. we don't know if that's the person that rented this truck. we know that the truck is from a rental company. we don't know if it's the same person who then carried out the attack. we do know that somebody is in custody right now in what the pan spanish authorities say is an arrest tied to this terror attack. we're just trying to figure out all these players. are we talking the same person or several people. so we're trying to get that put together. we know that they're look the a