Bronx Assemblyman Eric Stevenson was found guilty Monday on bribery charges.
Stevenson was accused of taking more than $20,000 in bribes to help four senior center developers.
He allegedly introduced legislation that would have allowed them to operate without competition.
A defense lawyer argued that the government used a corrupt informant to trick Stevenson into saying things that sounded incriminating.
U.S. attorney Preet Bharara released a statement saying that Stevenson brazenly betrayed the public and that his office will continue its efforts to clean up New York government.
Stevenson faces up to 20 years in prison.