and that s what they did, and about two weeks later i got a phone call we know exactly who it is, we re going to be arresting him. last month mccurley pleaded guilty to the murder of carla walker. some people, however, simply don t believe that ethically this technique should be used worried that opening up people s dna to law enforcement, people who are not known criminals, could have worrying consequences. genetics isn tjust any old tool for law enforcement. it s a particular and a potent tool, because it s not like a phone number that you just change when you get too many spam calls, or even a social security number that you might have reissued if somebody takes yours. it s a technology that s in its infancy. we don t know yet what it will tell us, how well it will tell us things about people. the big criticism of this technology is around consent. so after i get my dna tested, i can go on to gedmatch and i can upload my raw dna files to the website.
and that s what they did, and about two weeks later i got a phone call we know exactly who it is, we re going to be arresting him. last month mccurley pleaded guilty to the murder of carla walker. some people, however, simply don t believe that ethically this technique should be used worried that opening up people s dna to law enforcement, people who are not known criminals, could have worrying consequences. genetics isn tjust any old tool for law enforcement. it s a particular and a potent tool, because it s not like a phone number that you just change when you get too many spam calls, or even a social security number that you might have reissued if somebody takes yours. it s a technology that s in its infancy. we don t know yet what it will tell us, how well it will tell us things about people. the big criticism of this technology is around consent. so after i get my dna tested, i can go on to gedmatch and i can upload my raw dna
it, because when you test dna you re consuming it, and so you re destroying evidence. 0nce they d sequenced to killer s dna, they ran it through several genealogy websites. from there they created a family tree of the killer, and then began to look for possible suspects the right age, male, who lived in texas at the time of the murder. they developed a theory that the dna found at the scene belonged to a man called glen mccurley, a man who lived close to carla, a man who had previously been a suspect. i know that he had had to drive up and down the road in front of this house thousands of times, probably had even stopped here. they knew who it was, but they had to do their due diligence as law enforcement to confirm.
to hundreds of thousands of markers, and with that information, we can detect more dista nt relationships. every time you test for dna, you lose a bit of the sample in the process. in carla s case there was little of the killer s dna left. it was likely this was the last roll of the dice. we had to ask ourselves, have we seen enough dna that is of this kind of quality and property, to where we feel confident that there s a good chance we ll have a positive outcome? otherwise, we don t want to do it, cos when you test dna, you re consuming it, so you re destroying evidence. once they d sequenced the killer s dna, they ran it through several genealogy websites. from there, they created a family tree of the killer. and then began to look for possible suspects the right age, male, who lived in texas at the time of the murder. they developed a theory, that the dna found at the scene belonged to a man called glen mccurley, a man who lived close to carla, a man who had previously
been a suspect. i know that he had had to drive up and down the road in front of this house thousands of times, probably had even stopped here. they knew who it was, but they had to do their due diligence as law enforcement, to confirm. ..and that s what they did, and about two weeks later, i got a phone call we know exactly who it is, we re gonna be arresting him. last month, mccurley pleaded guilty to the murder of carla walker. some people, however, simply don t believe that ethically this technique should be used, worried that opening up people s dna to law enforcement, people who aren t known criminals, could have worrying consequences. genetics isn tjust any old tool for law enforcement, it s a particular and a potent tool. because it s not like a phone number