Thank you for your follow up.
Unfortunately, there is no legal way to speed up an expungement process and the Governor can only issue a full pardon, which would forgive convicted person for the crime and would preclude employers from using conviction against the pardoned person, but a handwritten letter would generally not help, beyond it being a personal reference from a government official.
So, generally, unfortunately, aside from letting your local attorney pursue resolution of this conviction and also obtaining personal character references from respected government officials / community members and offer of explanation of this misdemeanor conviction to any potential employer, I am afraid there would not be much else that can be done, until expungement is granted.
I am very sorry to provide you with this bad news, but please understand that I do have professional obligation to provide JustAnswer.com customers with correct answers, even when answer is not favorable to the customer.
I wish you the best of luck and God bless you!