Suspect led police to the body of Mollie Tibbetts

Iowa Division of Criminal Investigation is revealing how surveillance video led to man suspected of murdering the 20-year-old Iowa student.
4:37 | 08/22/18

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Transcript for Suspect led police to the body of Mollie Tibbetts
We want to get right to that tragic news in Iowa police say they have arrested a man in the murder of Molly tidbits after he led them to her body. Alex Perez has more from Brooklyn Iowa on the investigation announced sounds like the big break in this case was surveillance video. Yeah that's right Diane the surveillance video investigators say was a key day got about 4000 tips from the public over the last few weeks but. It wasn't until they got the surveillance video that came from the camera on a resident's home that they were able to piece this all together and tracked down the suspect. I talk to weigh the investigators were the lead investigators. With the Iowa division of criminal investigation. Let's take a quick listen right now to what he told me about how all of this investigation came together. The tragic end in an all of us were hoping for or for a much better outcome for small obviously Kamal in for her family. But as this developed in weeks we received this video late last week investigators went through. The video which took hours and hours and hours frame by frame and in real time motion in and eventually. Sought Molly on the video. Let us to mystery of air identifying the vehicle and identified mr. bear that was the owner of the vehicle. And ultimately tracking him down in game he was cooperative with us you know it with the with that part of the investigation in. And through some of the information that he gave us it was. It was obvious that he was responsible for Molly's disappearance and pain homicide scene he ultimately led us to where her remains were found yesterday morning. So that surveillance video as you heard the investigators say there was a key now Molly tip it's the University of Iowa student twenty years old disappeared back on July 18. Investigators have been looking for her ever says would you take a look on the other side here this is downtown Brooklyn Iowa small downtown just about a block thereby. That downtown area sort of became the center point the meeting area for so many in this community who work. Hoping to find answers. About Molly and where she was hoping this would come back alive. But unfortunately now they are dealing with the reality of things in trying to really process all of this now authorities say 240 Christian Rivera the suspect. Who is now in custody he's been charged with their first degree murder they say as you heard the investigators. Tell us there he confessed to this crime and then he led them to Molly's remains so that BI investigation here still. Continuing forward the suspect expected to make his first appearance in court later today. In terms of a motive Diane investigators are still kind of holding back close to them and they haven't revealed any of those details just yet when they office. That he was in the country illegally and is there any indication as to what he was doing in the United States and out how he got here. But you know we don't have a lot of details yet about the suspects. Immigration status we do know investigators have told us he was in the country. Visit lawyer Eric H farmer. Farm company here in this area here be barred because he's been an employee there for the last four years they say. He did it costs the at prove that you're allowed to work here in this country now of course this has been polarizing topic here in this area and across the country in terms of immigration president trump even talking about the case here involving Molly tidbits on the campaign rally are at a rally in West Virginia yes realistic listen to what the president had to say. Yarn about today with the illegal. Alien coming again. Very sadly from Mexico. And you saw what happened of that incredible beautiful young woman. Should it never happened. They legally and our country. So this case now getting the governor of Iowa and so many others. Two tweets and talk about the immigration system once again calling it broken and saying that changes. Need to be made for suspect is due in court later today Diane but the family has from day one. Really put their trust in investigators' and say they. They believe in what authorities are doing and they they believe that authorities were going to be able to piece together what exactly happened to their daughter. Com but as you might imagine right now but this is the devastating it's devastating to the community it's particularly especially devastating. To the family this is not the outcome that anyone here want. How much parity there Alex Perez from Brooklyn Iowa Alex thank you.

This transcript has been automatically generated and may not be 100% accurate.

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