Secondly, nobody really likes hiring someone who speaks negatively about a former employer. Especially when there's no way to verify whether what they are saying is true.
I personally could care less whether you posted screenshots or not. But if you were considering employing someone and found that they had posted something like this (with little to no evidence), what would your reaction be? Heck, what would your reaction be if it did have screenshots?
Pardon my pet peeve.
To answer your question: if it were me hiring a person, absence or presence of screenshots would not make any difference. A contract is a contract and the person is owed $10k.
Here's a link to "could care less" in The American Heritage Dictionary of Idioms, http://books.google.com/books?id=9re1vfFh04sC&pg=PA137...
Pardon my pet peeve.
I would have second thoughts about hiring this guy, not just because he took his dispute with an earlier employer public, but also because he apparently blew up a production server and screwed everything up for several days.
Right now these are the exactly two things I know about this dude, and put together they don't give a strong first impression.