I would get in touch with the company that turned you down and tell them you made a mistake for not requesting the release of information. See what they wrote there for you.

I have been to the both sides of the story : filled out PRIA forms for former instructors. The ones that I had a problem with I simply put "Not rehireble" Mostly because of attendance issues, not because of the personality clashes.
if they put something a lot more than that, then it's a problem.

Then you have to move on. Bad and unfortunate stuff happen to good people every day, every hour.

You have to choices: talk about this and feel miserable or go through the whole process again.

Sometimes things happen for a reason.