If he qualifies for the assistance of the public defender, they can file the paperwork for him. Otherwise, contact the lawyer and ask what will be needed to get that lawyer to continue the representation. The last alternative, is for him to file the paperwork using one of the paralegals in the facility to help him format the paperwork. Good luck.
Since I do not practice law in your State, this answer is provided solely for informational purposes only, for you to use as a starting point when speaking directly with a lawyer in your State. This answer does not constitute legal advice, create an attorney-client relationship, or constitute attorney advertising. I urge you to immediately contact an experienced criminal defense lawyer admitted to practice law in your State before you make any decisions about this case.