This website will help you find out if the FBI has a file on you or a deceased family member.
Most requests end up being free because the FBI will give you the first hundred pages of any file for free. However, pages beyond 100 are charged at ten cents per page, and the FBI requires you to state up front that you will pay these copying charges or they won't process your request.
The website also explains what happens after you send in a request. Perhaps if they don't have a file on you, then by making this request they may start one (LOL).
Go ahead - have some fun .. do your very own FOI (Freedom of Information) Request!
... because if you don't ask, you'll never know ...