Ah, I was going to post about pursuing him through tax returns etc, but if the guy is abroad it can be difficult to attach to earnings anyway.
BUT, seeing as it's YOU....
You know this guy is a wanker, you know he's threatened to kill you, attacked your home, threatened your DS, has stalked you, you know you live in constant fear of him.
Why on earth would you pursue him for anything? You need to understand that this man is dangerous both to you physically and mentally.
You have to get away from him physically, and psychologically. He's never going to come good, no matter what you hope. You need to kill him off in your head. close the book on him.
STOP looking at his pissy little blog,
STOP looking out for him.
He's terrorising you without lifting a finger now, cos YOU are doing HIS job for him.
PLEASE go to WA and get some RL support with this. Until you do, you will still be his victim, day in and day out.
When are you going to give yourself your own life back? It's YOUR life now.
Get angry, get indignant, but GET FREE.