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>> the noises were heard by a canadian p-3. and that was this morning and some yesterday. >> reporter: the noise described as banging sounds at regular intervals in the department and homeland security briefing are now described as less specific than that. but still, the focus of the search. >> we need to have hope, right? i cant tell you what the noises are. what i can tell you, and i think this is the most important point. were searching where the noises are. >> reporter: the sounds ...

Justice lead, court documents reveal that dna found at the crime scene of the four murdered university of idaho students is a statistical match for the suspect. bryan kohberger you may recall is charged with stabbing ethan chapin, and three other victims at an off campus home last fall. what does that mean, a statistical match? >> reporter: this document that was just filed, a motion filed by the prosecution, it states as fact that after bryan kohberger was arrested they got his dna. they did an...

Rub a little of that material onto a small piece of filter paper and i apply a series of three chemicals. if get a pink color change at the end of that series, that would give me an indication that would be positive for the possible presence of blood. >> before we get into the heart of why youre here, i want to talk briefly about the significance of your findings. assuming you get dna results, i want to talk briefly about the population matters. let me ask you some of questions regarding that, i...