This interview was obviously arrainged by his attorney, to put some 'good press' about Adam out there. He was most likely told how to dress, how to behave, and attorney was there to advise what could and could not be spoken of.
That said: I didn't see anything that showed Adam as either a killer or a saint.
He reminded me of a couple clients I had. Stoic, fairly unemotional, and passive.
Some men are trained not to show emotion, and he probably is one of them. He may well be under mom's thumb. Tht may be the sort of person he is, a man who lets women run the show.
Of course mom would take up for him. Nothing he does or says will bring Zhara back. I think it's very unreasonable for anyone to expect a mother who's already lost one person in her life she loved to give up another. Whether or not he's responsible in some way, she can't see it that way, and thats the way many people would be, I think. It's normal. How can you believe that your son could do something like that? You can't!
I didn't see anything either way that would indicate what he did, or didn't. I saw a man who's frightened, in shock, and perhaps not too sure of what happened, or how.