Responses
I think Doha going stiff when they found a tape is a genuine reaction. I think he genuinely didn't know there was a tape there = he didn't find Bada's tape yet. We all know how calculative Doha is. He wouldn't leave that tape there so he could keep watch on it + he wouldn't let Bada near that area if he decided to leave it there.

Yep he hid it on purpose,I mean cmon it was obvious from the start i think he will lock him up or just reset his cassette once more