What's the question? You should have hired an attorney because you only get one chance to do it right unless there are new and different facts.
This is just my opinion and not a comprehensive answer. You assume the risk because this answer may not apply to your situation depending on the facts.
You can still consult with a lawyer if there are continuing issues with custody, and you probably should if there is this history of violence.
Marshall Waller may be reached at 800-655-4766 or by email at: email@example.com. Follow him on Twitter: @feinbergwaller. Responses to questions posted by Mr. Waller on AVVO are intended as general information based upon the facts stated in the question, and are provided for educational purposes of the public, not any specific individual, and the response to the question above is not legal advice and it does not create an attorney-client relationship. If you would like to obtain specific legal advice about this issue as it pertains to your particular situation you must contact an attorney who is licensed to practice law in your state.
Sign up to receive a 3-part series of useful information and advice about child custody law.