Can a person, with a felony charge oversea(15+years ago) , yet with no criminal record in the US practice law?

You would have to disclose the conviction to the Board that oversees practicing attorneys. You could attempt to contact them ahead of time so that you have some kind of indication if it will be a determining factor but they might not give you an answer that you can rely on.

I hate that my answer is "it depends", but it depends - the type of conviction, the types of rehabilitation you've done, the amount of punishment, etc - are all factored into the board's decision.

First, to become a lawyer, you have to establish good moral character. You will have to disclose your foreign conviction. It will then be up to the Board to decide if you can be admitted. To become a prosecutor, you may also have to get a security clearance which could also be a problem. There is no way to know in advance what these decision makers will decide.

This answer is provided for educational purposes only and is not intended as the practice of law in any jurisdiction in which I am not licensed. The answer does not constitute legal advice nor does it create an attorney-client relationship. The answer is based only on the information provided, and may be inaccurate in the context of additional facts that have not been provided. The questioner should be aware that I am only licensed to practice law in the state and federal courts of Minnesota. Accordingly, before taking any action or refraining from taking any action, the questioner should consult with an attorney licensed to practice in his or her jurisdiction.