[1/2] Norman Seabrook, (C) the head of New York City's prison guard union, exits the Manhattan District court house in New York, U.S., July 22, 2016.
Seabrook, 63, the former head of the Correction Officers' Benevolent Association, has spent 21 months in prison after unsuccessfully appealing his August 2018 conviction.
"The sentence Huberfeld originally received reflected an approximate equivalence between the conduct of the bribe giver, Huberfeld, and the bribe taker, Seabrook," Hellerstein wrote.
The correction officers union has about 20,000 active and retired members.
The case is U.S. v Seabrook, U.S. District Court, Southern District of New York, No.