Houston mayoral candidate Ben Hall held a rally Tuesday night officially announcing his candidacy.
Hall also responded to Mayor Parker's tax return challenge.
Earlier on Tuesday Mayor Parker released seven years of income tax returns and challenged her opponents to do the same.
Hall said at this point he has no plans to release his personal tax returns and that he wants to investigate how Mayor Parker makes her money.
In a statement released from Mayor Parker's office, they said she inherited some property from her grandmother and her house is worth more because Houston is doing better.