This morning, I woke up and in my half-asleep state, I thought I saw a headline that BIL was responsible. However, it was just another interview with him.
FWIW (not a lot I know), my first thought when I mistakenly read that, was not surprise or shock. Rather, that it should have been obvious. Naturally, this is real life, but in an Agatha Christie novel, BIL would be a prime suspect.
It IS actually shocking how much BIL has inserted himself into this story. Very telling that he is not talking to police right now, he admits another (likely more responsible) family member is handling the real work. I also rewatched some of his interviews just now and I note there are no real tears shed.
I'm not saying he should be a suspect (I will accept he isn't, if police have ruled him out), I'm just saying I'd divorce a man for less, and I think his behavior must be, at least, embarrassing for some of his family