How do I find out if there is anything going to show up on a criminal level 2 background check for a position as a high school teacher?

My son was involved in an altercation with a man I was dating when my son was a teenager. My understanding is that the case was sealed but don't have any proof of that. My son now wants to become a high school teacher and must pass a level 2 background check here in Florida. I would like to have a 2nd level background check conducted so we know if there is anything there for them to find. Can you do that for us? And advise us on next steps to take if anything shows up?