A tip led to a couple more names, an interview led to a couple more. At one point it was,' Well, everybody is doing this, ’ of course, we didn't believe them up front and the more we looked, the more we said,' You know, hey, we have to turn this over to the PD. This is deeper than us. ’ The school’s investigation revealed students were sharing explicit photos of each other and storing them on hidden photo vault apps, disguised as other applications.