Who do you think killed Stuart Chandler on AMC? I have my thoughts?

I think Nurse Gayle, she did it for David, to kill Adam but shot Stuart by mistake.

I have this strong feeling that Zach may have done it. But then again he couldn't. And then theres Erica, who was clearly at the mansion that night! Remember when she dusted off her shoes at the hospital? That was never fully explained..yeah. Also, that nurse. Nurse Gayle I think. She could have shot Stuart thinking it was Adam also..its really all up in the air. Chuck Pratt really has me puzzled. But by Labor Day we should all find out..

I was thinking Annie, but then started to wonder if maybe her daughter Emma may have since she was wandering around looking for her mom maybe she grabbed it. But after reading another answer on here i wonder now if maybe it was nurse Gayle even though they didn't show her on there. I read somewhere that it is going to be someone you least expect and that it won't be known until September which of course they want to drag that out like everything else.

I still think it may have been Scott. Liza and Annie look equally guilty too though. But I think Scott wanted Adam dead so he could have the company and bc of the herat valve scam.