michelle's defense right away. their daughter wasn't trouble. they started their own investigation. >> was it clear to you, like, if you're going to probably wear this, thank you have to understand the story told by the computers? >> correct. >> the forensics of this. >> absolutely. >> you have to learn a bunch. >> i know ip addresses, all that other stuff. >> and ip addresses a numeric code that identifies a computer network for an individual device. mike i top use of all the incriminating emails from the evidence filed from that restraining order. you started going through the software that traces ip addresses. >> this investigative software that you become your detective, is that something you have to go to caltech to get a copy of? is this nsa material? >> gosh, no. a 15-year-old kid material. >> it's like a salt, suzanne what organize them. >> he would print out on yellow pads of legal paper all of the ip