Yeah the issue was more the logistics. I'd thought up a couple reasons for him already but thanks for clearing it up, I wanted to make sure I didn't go about it in a way that breaks the lore and it turns out it's a lot easier than I thought to join the other team :p You have given me some interesting things to think about in refining the sheet though. 

Once I get the chance I think I'll stick with a renegade from the Howling Griffons and use the various antics the chapter gets up to on their home world as the starting off point for his dissolution.