sclarke, why do you need to "find out more bad things" he is doing? Having read all your posts I think he has done more than enough already to have you cutting ALL ties and never wanting to hear his name or any news of him, again.
While you have him at the forefront of your mind, you give him a sort of power still over you. Until you cut him out of your life entirely, he will continue to hold you back.
Spend time on you and your business, and LET HIM GO.
God bless