Who did it?

I forgot which episode it was, but what was it that was threatening the MC all this time? Via telephone, then video with 2 people in black masks, taking over/hacking MC's cellphone, Tracking the location of Hannah's cellphone while connected to MC's cellphone, it's all Richy's doing??

And what confused me was the first threatening phone call. We haven't even done anything yet, and we're already being threatened.