I've worked with vice-principals at elementary schools investigating porn on library machines who had a better grasp of forensics.

Really, I teach a course in a local forensics program and have helped a couple local schools over the years. Any teenager with an iPhone could have explained that resetting the AppleID was a bad idea. There are plenty of very intelligent kids out there who need jobs. For the FBI to act in such a manner is inexcusable. Ditch some of these hack cops and hire some proper technology experts.