I’m wondering how they concluded that. I’m not saying it isn’t possible or that the guy is innocent, but if you watch enough true crime shows, you know that sometimes police get pretty overzealous (especially in infant deaths).
As a parent, I also know kids will do all kinds of stupid things and if the father left his 1 1/2 year old and infant together like that, who knows. Was it stupid to leave them alone for 10 minutes? Definitely. I bet there won’t be a day in that guy’s life that he doesn’t regret that action and perhaps there should be manslaughter charges or something like that (negligent homicide?).
The accusation sounds kind of far fetched though, and I’m not sure how they’ll make anything beyond a circumstantial case there.