Of course you are fully entitled to your own opinions, thoughts and ideas.
But speaking for myself, there was and is no evidence to convict Darin.
Darin did not tell a "self serving fictional" story to the Police to cover up his crime.
Darlie is where she belongs, actually I believe that she should have been put down years ago. So she is not where she belongs, she belongs 8 feet under.
There has been speculation that Darin knowns more then he has let on, but I would say that the information that he has with held is not in the "favor" of Darlie.
If Darin did speak up about that information, that there would be "no" cult of Darlie supporters, whom have been manipulated and conned into thinking that this poor "ole" Mom, is a victim.
She is still alive and on death row and the two innocent boys are dead, even before they began to fully experience life. Who is the real victim.
Darin knowns that Darlie killed their sons, but "I put money" that she blamed him, that he "forced" to her to it, that is is his fault, etc. Therefore, he "protected" his wife, all the while feeling guilt that he may have "caused" her to harm the boys....
Also, she has probably said: When I get out, I will be the mother to my son. So don't do anything to ensure that I don't get out, as our son needs his Mother.......