CSI episodes that haunt you?

Wll I've only watched Miami so these are mine (I don't remember the names):

• the one with the kid that was sa'd by her tennis coach...he deserved better

• the one with the kid that murdered her mother bc she was an abusive monster and feared her

• the one in which a kid is murdered by two jocks (I think? I don't remember well, but they were high school students) because the kid saw them smoking a joint

• the one with the child beauty pageants