So this guy gets a felony for deleting photos and others "allegedly" had photos that they erased (a felony) and the author is somehow unable to figure out why no one will speak up?  If trying to help your friends stay out of trouble by warning them is hindering a prosecution (another felony) then every kid who passed on the same advise would also be potentially subject to those charges.  Better  keep your mouth shut,  anything you say may be used against you.