Perhaps if he'd made more of an effort to physically remove his son, the authorities might have upped their game and started to question why he was so eager to get his son out of there? And in all honesty, if you had a smidgen of doubt regarding the care of your child by your ex, you'd not do a thing Chilldoubt for fear of retribution to yourself? Really?
And Rosetta raises a very good and vaild point- where was he in the 2 years between the tot dieing and being found?
Im not losing sight of the fact it's the mother who's on trial here, she has to face the consequences, but I still feel the rest of the child's relatives (elder son included) must also be held accountable.