announcer: this is cnn breaking news. it is the top of the hour on cnn newsroom. i m sara sidner. we begin with hour with breaking news and a long awaited arrest in the horrific killings of four university of idaho students back in november. bryan christopher kohberger is in custody on a first degree murder warrant in those stabbing deaths. that s according to an affidavit. the killings terrorized the small town of moscow, idaho, which hadn t seen a murder in seven years. investigators are going to be holding a press conference. they are setting up as we speak, and we are going to take you there live, but first, cnn s jean casarez is in monroe county, pennsylvania. that s where the arrest was made, and cnn s veronica miracle in moscow, idaho. jean, we ll start with you. what are you learning about how this arrest actually came to be? reporter: well, it happened at 1:30 this morning, and it s very, very interesting to look at how it was afeffectuated her and what happe
through and coming forward now to this conclusion. sara? ve ronica miracle. great reporting. it is chilling what you are saying if indeed ithis is the person who committed the crime. innocent until proven guilty, but there was a study he was involved with looking into f feelings after a recent criminal offense. thank you for all the new details both of you this hour. casey jordan is a criminologist and behavioral analyst and we have the former boston police commissioner. i want to start with you, ed. sources are telling cnn investigators traced ownership of a car seen at the house, and dna taken from the scene itself in order to apprehend this person, mr. kohberger. can you tell me how these pieces of the puzzle can come together, and if there is dna, does that indicate that they have his dna, they were able to find it in