Please, please please turn him in. There are so many animals out there that we don't have the capability to help and here is one that may be able to be saved.... This small minded lazy man will not have the ingeniuty or the intelligence or the motivation to retaliate. He can't even be bothered to buy his own dog a food dish...
I understand your concern about Misfit and I would be sure to keep her as safe as possible in the meantime...
But you know deep down in your conscience what the right thing to do is...
Think about it, what would Misfit do or want you to do in the situation?

Good luck...