I don't know what the statute of limitations is but just because they didn't file before does not mean that they cannot file now if the statute has not run. Why don't you talk with a lawyer about turning yourself in and taking care of the matter instead of running and worrying? There are many great lawyers in Houston who handle federal cases.
Although I have answered the question to try to help you, you should consult with a lawyer in your area in person on the matter. In addition, my answer does not establish an attorney-client relationship between us.
a bench warrant is an arrest warrant which most of the time tolls the statute of limitations. You should hire an attorney and take care of this matter.
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You will need an experienced federal criminal defense lawyer to sit down with and get all the facts in order to handle this situation. If you have a warrant out, then this is the only way to resolve it.
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