So I was watching Teen Titans Go and Raven had to talk to Death to get the rest of the Titans back because they died. ( tured into old people) When so she got to Death he sung some dumb song but the thing that killed was in the background of the song. There was a tomb stone that read " Jason Todd" ". If im getting my Batman canon right. That was the Robin that got fucken blown up by the Joker.