I'll try to make this short and sweet, but descriptive. I do tech support for a school. A teacher is getting lewd photos and emails from a fake twitter account and on school forums. We got the IP from an email, I googled, a lot, and connected this IP to a YouTube channel, found a video of a student who has this particular teacher. So I got my guy, right? Turns out this kid makes good grades, but has brothers. I find a Facebook page with his alias that links back to one of the brothers. So with an IP, how do I determine which kid it is doing this? Can I link a houses IP to one device? Find a mac address from the emails/twitter posts with the IP? Hell it could be their dad, because the external IP doesn't point to one device in the house, right?