What credit reporting agency did he use to check on them? Experian operates in Canada right? I wonder what their score was.
To rent a nice house in LA you need a beacon score of like 720
If these people really had great credit I doubt they would have done what they did. There is a big difference in quality of people between "pretty good credit" and "really great credit".

Oh yeah I know "sometimes bad things hapen to good people, I know my credit is not great but give me a chance to prove myself" blah blah blah cry me a fucking river.
Better to leave a property empty than to rent to someone who has less than a perfect rental application.