Complex sentence: Douglas Fowler's younger brother, Hendrix Marion "Mutt" Fowler, Sr., was the mayor of Coushatta and later a Democratic state representative from 1972-1986.
Split into simpler sentences: Douglas Fowler's younger brother, Hendrix Marion "Mutt" Fowler, Sr., was the mayor of Coushatta. He served as a Democratic state representative from 1972-1986.