By the last year of his term, in 2011, Brown will surpass the longevity of the current recordholder, Benjamin Downing, who served from 1865-1883 before being ousted by then-New York Gov. Grover Cleveland.
'The Judge' nearing record
The second-longest serving district attorney, Charles Sullivan, served from 1935-1951.
Even now, the Brooklyn-born top prosecutor keeps an exhausting schedule, rising at 6 a.m. and returning home at 11:30 p.m. or midnight, he said.
He is renowned for his frequent appearances at crime scenes at all hours - supporting those he works with by showing that no job is too small for his attention.
His next goal? To outlast Manhattan District Attorney Robert Morgenthau, 88, with whom he shares a good-natured rivalry over Morgenthau's 33-year tenure in office.