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Idaho crime lab and extracted that creating a genetic profile it is made up of 20 genetic markers, with the trash pull from family home in pennsylvania they would not have known whose dna they were getting, they could tell it was a male. and when they tested it, it wasn't the same dna that was on the snap, but it was determined to be the father of the person whose dna was on the snap that is a straight forward comparison that is a standard paternity comparison which has been accepted in courts for decades. this is really straight forward, and really high confidence. nancy: hit me with the numb...

Walls? >> there probably is more dna at the crime scene it was a very bl bloody crime scene, there would be floodblood -- the wall depends on what parts of person were injured, if you cut an artery there will be spurting blood. >> there will be more suspect dna because he held that victim in place there will dna of his on their clothing, reason there blood on the wall, a cast off pattern, he was the stabs them repeatedly that blood is flinging off that knife to the wall, that is how we can sometimes determine the number of stab wounds. >> there could also be --

And heard noises. and then she saw the alleged killer. she saw him go to the backsliding glass door, and shut her door and locked it, i wonder, if she didn't just crack the door and was looking out, because the kill her to walk by her door. >> he did. but let's go a second. this killer entered on second floor through the sliding glass door. why go to third floor at all. i believe again, his targets were on the third floor. he doesn't have to go up there. but kaylee said she had a stalker, her dad said she had a stalker, she was not supposed to be there she was in a car that did not have a tag,...

Spying on him, brian. >> i think there is a lot more in this arrest warrant. they had enough for a search warrant of cell phone records a week before dna there is more to come, the cops did an amazing job, him shutting his found off will be used against the him, they will look back. there is a lot more to come. cops did a great job. nancy: all right, cc, i have a few seconds. do you predict there will be more dna linking back to the alleged killer? >> i do. i would not be surprised we know that the eyewitness saw his eyebrows. that means highest not totally covered if his head was not covered ...

Accused killer bryan kohberger. we have seen then taking a number of items from this house over the past couple of days. those include mattresses. you will remember at least some of the four victims were killed in their beds as they slept. so those in mattresses likely to be very crucial in terms of evidence gathering. and forensic experts talking to fox say they believe that investigators will find a lot more dna evidence as they continue to go through everything at this awful murder scene, listen here. >> we are talk about any kind of touch dna like skin cells that are sloughing off, you als...