I think that if she did it, yes Darin had involvement. He had to be. And you are right to say that if he knew about it and covered up for her, helped stage, or anything else he is as guilty as she is. Wrong is wrong, no matter how much involvement he had. There is no gray area, IMO, of amount of involvement and guilt.
However, for some reason I have a really hard time with this case. I have been following it since the day it hit the news. I have read everything I can find on it, and really studied it, and I don't think she did it. I have taken many MANY college courses on criminal psychology and profiling (haven't gotten my degree in it yet because I think it's more important for me to be available for my kids right now).
I think she should be retried. If she were retried and found guilty again, I could accept that and admit loudly that I was wrong. However, even the court transcripts make it hard for her to appeal fairly because they contain so many errors that change the light of entire statements during the trial. So I say before you send people to death, atleast go the extra mile and make dang sure they got a fair shake.
I feel for those boys every day. I know they are with God in a better place, but life on Earth was stolen from them. I am not forgetting them. There is not a day that goes by that I don't think about them, honestly.
But Texas is America... and America, by definition, is fair.
Well anyway, my view only.... try not to be too painful on me. I left a message on the Jonbenet Ramsey and almost got my head bit off because I asked about whether or not the bedwetting and infections were a recent developement.