Here is a link to search court dockets for cases (such as small claims court and petitions for protective orders) in Oklahoma (for FREE).
For "Court," choose the county if you know it.
Type in the person's last name (and first if you know it).
You won't be able to read the documents; but, you will be able to search for cases in which a person was a party, and read what the result was. (Judgment for Plaintiff means the Plaintiff (person bringing the lawsuit) won. Dismissed means no judgment for either party.)
http://www1.odcr.com/search.php