What's past is past. You can't undo it. Do you live in a small town where everyone knows everyone else's business or do you live in some place larger?
Nine years is a very long time and everyone changes. What makes you so certain you were the only one in that area that was like that? Who knows, many of the people who might remember you may have moved away.
The_girlfriend is right. Move on with your life. Show them how far you've made it. If someone brings up your past just ignore them or fix a cold stare on them. Life handed you lemons--now make some lemonade.
Good luck!