I think the same bluntness
And i know he killed a vibrant young woman with her whole life ahead of her but with the dog, that took ‘thinking’ about. He did that to cover his arse after he allegedly ‘snapped^. It just accentuates how evil he actually was.
For what it is worth, I doubt he snapped. He just got his own way by using violence.
As toffee said also, it is a blessing that he didn’t kill the baby but what an awful weight he has given her to carry through her life. 