This answer contains spoilers… (view spoiler)[I solved the bullying issue early on, but I didn't know who got killed until it happened. I did think that Celeste would end up killing him. There's really no way to guess, IMO, and the guilty one kind of came out of left field. However, I listened to this on audio, and there was a comment early on about Princess Diana's funeral and the "mummy" letter that made me assume the dead character is one of the mothers, and I was dreading that because I didn't want Jane, Madeleine, or Celeste to die. (hide spoiler)]
Janette You dont solve the murder. You're three quarters of the way through before you even find out who was killed, in fact, I wouldnt call it murder, homicide at best. When the death occurs, you know who did it. But it's still a cant put down read just waiting to find out who was killed.