A prominent Kurdish human rights defender was assassinated while talking to the press.

We don't know whether the Turkish state was responsible for the Elci's assassination, but we know it was responsible for his completely indefensible prosecution. The Turkish state has often engaged in violence, even fatal, against opposition political groups; this has gone on for decades.

Erdogan's party seems to have got PISSI to help out with a couple of handy bombings of Kurdish rallies. That doesn't prove it arranged the assassination, but I doubt it would have scrupled to do so.