youaremyfavoritekindofmelody whispered, "I know that it would make a lot of sense for A to have been the one to take the pic of Kate & sent it to everyone. But I kinda think Kate took the pic & sent it to everyone to get Hanna in trouble. She was in the locker room alone & watched Hanna put her phone in her gym bag. It wouldn't have been that difficult to set a timer on the phones camera & set it someplace. The picture just looked too posed to me. It would be the perfect way to get Hanna in trouble b/c no one would believe Kate sent it"
You were close :D