they saw a black car and what they were able to gene from that is there was a man following mollie along. eventually he got out of the car. >> he tells us he ran alongside her or behind her. then at one point he tells us mollie grabbed ahold of her phone and said you need to leave me alone, i'm going to call police. then she took off running. he, in turn, chased her down. he confessed to this. in fact, he took them to the body just yesterday. so you can understand why people are so upset about this. now they have this man in custody, christian rivera has been charged with first degree murder. in fact, we are told he lived in this community some four-to-seven years, in fact, homeland security will give us more information in the coming days about him. we are told he is an illegal immigrant in this country, again a lot of people confused about exactly what happened. he's telling investigators he blacked out some time and maybe placed mollie in the truck. we're not sure how long her body