I need a lawyer in the Dallas TX area to help me expunge a misdemeanor from my record

I need a good lawyer to help me expunge a misdemeanor from my recod. This happened around nineteen years ago in Fort Worth, TX . I was charged with "Failure to keep inventory" . I ended up with six months or one year defered adujication.
More details on this:
Nineteen years ago I worked part time for a small tire shop. Three months later a person identified himself as a salvage yards detective showed up and asked for the owner of the business. Unfortunately, the owner was not present that day. He asked me to show him the inventory invoices. I handed him a big folder marked inventory. He looked at it, and then he said that all tires were supposed to be marked with the corresponding numbers. So, out of the nine hundred tires he pointed to eight of them that were not marked with numbers. He said, ‘ the eight tires were not stolen nor were they reported stolen but the city ordinance allows him to confiscate the tires and to arrest the owner of the business. However, since the owner of the business is not present he has to arrest the one with the key. Unfortunately I had a key because I was in charge of opening. And I was arrested for, “failing to keep inventory”.

Later, the business owner’s attorney told me to go with him to court and just say guilty. He said, “this will be dismissed and will over with in six months”. This resulted in six months probation. The probation was dismissed after only three months.

Please keep in mind tow things: First I was only a minimum wage worker who happened to be at the wrong place at the wrong time. Second, I was a young poor immigrant who did not have the knowledge or the funds to hire an appropriate legal council. Instead, I relied on the advice of an attorney who represented the interest of the owner who hired him.