Not looking to pick a fight...but there is bias built into your response. If the mother want to control the kids, that is perfectly normal (admirable), if it is the estranged father that wants to control the kids, he is a manipulative, violent sociopath.
Don't get me wrong. THERE IS NO EXCUSE for this murderous behavior.
I am attmpting to discuss whether the bias in the law against fathers drives (at least in part) the bias in the number of these crimes committed by men.
No because many of these men commit these attrocious acts well before anyone ever goes into court or any paperwork is ever filed.