Who ran the background check and why?  Did you ask and did whoever ran the background check tell you what the source of the information was about the judgment?

Huh?  Local police aren't likely to have any information about civil lawsuits or judgments.

No.

You will need to contact the clerk of the court where the case was filed to obtain copies of documents.  It's possible, but by no means certain, that the court may have web-based access to its case files and documents therein.