>> Are people generally ok with the police opening every single school locker...? >>And what if while doing so they discover evidence of another crime? Is that

>> Are people generally ok with the police opening every single school locker...? >>And what if while doing so they discover evidence of another crime? Is that ok and usable?... Yes, yes, and yes. Police can open any (or all) locker(s) they want for any purpose, though generally they ask for permission from the school administration first, and they can and do use any evidence discovered. Pick your favorite BS legal handwaving, I think it's usually "the lockers belong to the school, and by its good grace allows[/forces] the students to use them"