Texans' rookie Mario Williams doesn't have a history in Houston yet, but his new home certainly does. The NFL's top draft pick purchased the controversial house of fired Texas Southern University President Priscilla Slade for about $1.5 million, according to records filed last week. Slade was dismissed after University regents alleged that she misspent hundreds of thousands of university dollars to furnish and landscape the 6,000-square-foot, Mediterranean-style house in the exclusive Memorial Park neighborhood near downtown.