Police investigation remains open. The photo of one of the minors included a fly; that is the logo of Clothoff, the application that is presumably being used to create the images, which promotes its services with the slogan: “Undress anybody with our free service!”
Why is it not sexual harassment if the target are teenage girls?
In my opinion there should be really impactful punishment for the people who did this. Otherwise there will be more and more people like you who seem to think this is a funny little school prank.