In the interview where DB admitted to being drunk I notice she reached for his hand and he didn't budge to take her hand. The camera stayed there for a while and you could see she laid her hand on top of his but he didn't budge.
I don't believe he was involved and I do believe he is heartbroken beyond belief. Totally in shock.
Yes, I noticed that in a couple of the interviews. Only once did I see HIS hand on HER leg and in that case, her hand was on top so she may have moved it there. In all the others, it appeared that she was the only one doing the consoling/needing comfort.