He could have helped the police with the investigation of his brutally murdered pregnant wife but he chose not to. Whether he's guilty or not, a decent person would have made the opposite decision.
And he did this so the police wouldn't lock in on him? Interesting, the last known adult present with MY before the police got there talked to the police freely and repeatedly and was not railroaded. MY's sister of course. And the friend who was with her before the murder? Not railroaded either. The newspaper delivery people known to be in the neighborhood and who talked to the police? Not railroaded.
In fact, how bizarre would it be if everyone who knew MY just refused to talk to the police because of the fear of being railroaded? Just not normal behavior.
That does not mean he's guilty of course. It just means his first thoughts when the police contacted him that his wife was murdered was not OMG I need to get there, I need to know what happened, I need to know if they are going to find who did this, I need to care for my daughter, but rather was simply, apparently, I need to make sure they don't get anything on me.
He's a sleazebag. Even his lawyers confess that - they did in the first trial and probably have in this one (I haven't seen much of this one). His move to have no interest in the investigation (not just refusing to talk) is because he's a sleazebag, and probably because he's the killer as well. Sure it's in his legal rights to be a sleazebag; he isn't guilty because of that though it is consistent with the actions of a guilty person. Not all sleazebags are murderers.
I happen to think he's a murdering sleazebag and I hope he goes away. However, I understand there is evidence, and lack of evidence, to cause others to think the case isn't proven or even, though I can't fathom it, that he is actually fully innocent of the crime. Either way, I hope they get a clean verdict one way or the other this time.