A Houston city councilman running for city controller owes more than $100,000 in federal income taxes dating back seven years, public records show. Ronald C. Green, a lawyer who has served in the city’s At-Large Position 4 since 2004, owed $120,043.11 to the federal government earlier this year, according to federal tax liens filed with the Harris County clerk’s office this past summer. The delinquent taxes go back as far as 2002.