Yes, I think you should retain an experienced immigration lawyer to prepare and file for citizenship, if that is the route you decide to take. The CMT is 10 years old, and should not per se bar your application, but will justify extra care in the preparation of the package. I am presuming that your parents were not married, and that he did not provide any support during your childhood. Meet with an attorney, and get a certified copy of the criminal record for his/her review (you will need it for the application, anyway). Good luck.