Autopsy on Found Iowa Student.
HARLOW: An Iowa community is grieving this morning after the body of what is believed to be 20-year-old Mollie Tibbetts was found in a corn field. An autopsy will be performed later to confirm how and when she died. Authorities spent a month searching for her. While they have yet to confirm the body is Tibbetts, police arrested Cristhian Rivera on first degree murder charges. You see him there. He is an undocumented immigrant. He confessed to approaching Tibbetts after he saw her running. He told investigators he, in his words, pursued her and then abducted her. The grizzly news crushed the hopes of family and friends and local authorities who had scoured the small town for weeks looking for her. She was studying psychology at the University of Iowa and has been missing since she left on July 18th for a run in the evening from her boyfriend's house. Let's go to Ryan Young. He is in Iowa for us following this this morning. What can you tell us about what the authorities are saying and also just how that community is responding?</s>RYAN YOUNG, CNN CORRESPONDENT: And, Poppy, this is just so very tough. We talked about this last night. And you can see the reaction throughout this community. We met a young lady last night who had to take her poster down and she almost started crying with us saying she can't believe that Mollie's gone. So you understand just the emotion here. This is the headline. I think it pretty much sums it up for a lot of people here. It just says the word here -- murder. And so you can understand the pains. Look, she used to run cross-country. She was running through an area and, according to investigators, they got video from a homeowner. The video was detailed enough for them to watch some of this happen. And, in fact, they went back and that's how they developed the suspect. But from what we're told, that homeowner's video had the black car go by. And Mollie was also running by. And what they described to us, Cristhian Rivera actually tells investigators that he was driving along. He had circled back a few times and then was riding alongside Mollie. He then gets out and was running alongside of her. And she said that she was going to call 911. He tells investigators that he blacked out and from there he doesn't know what happened next. But we know from the affidavit that he ended up putting her in the trunk. We're not sure what happened next after that, but we do know he eventually took her to a corn field where he put corn stalks on top of her to try to conceal the body. So there's so many questions in this area because they want to know what happened to her? Why would he attack her? We want to know the motive. And I want you to watch this video. This was yesterday at the news conference where we saw friends gathering here who were so very upset. This was a very painful moment, Poppy. Something that will stand out to a lot of our memories because you could hear people sobbing as investigators were talking about the details of this case, the idea that this young lady could be running and someone just attack her. And that big question is just why. Why would someone, Cristhian Rivera, apparently, according to investigators, attack this woman? And, of course, at this point there's so many questions more. And there is a court appearance today at 1:00, as well.</s>HARLOW: You know, as we wait for that and as we look at the pain on the faces of all of those who loved her, who knew her in this small community, we're learning some new details about who employed Rivera, right? He was an undocumented immigrant. And who hired him?</s>YOUNG: Yes, that is a good point there. He apparently worked at a dairy farm. And investigators say he's been in this area for four to seven years. He kept a very small footprint. But Craig Lang (ph), who's a prominent Republican in this area, apparently employed him. And so that is the point right now where a lot of people are trying to figure out exactly what happens next and what was his documentation? A lot of questions in this community.</s>HARLOW: Right. I think he said he cleared through the government e- verify system, but a lot of questions about how that could happen. Ryan, thank you. We'll talk to you next hour for more. Ahead for us, the White House's new strategy, to discredit the man who once said he would take a bullet for the president, this just hours after Michael Cohen implicates the president in federal court. We are following all of it.