"Hope is right," you say. "This is—" You don't get any further than that before one of the inmates of the Tower falls over dead in suspiciously close proximity to you. Gryan immediately rounds on you. "What do you think you can gain by killing my people?" he says.
Explain to Gryan that you're innocent. Don't bother to explain. Just side with Gryan. That may be the safest option. While Gryan is focused on berating you, attack him. If you were loyal to the Defias all along, this could prove to be your opportunity to prove it.