State Sen. John Sampson of Brooklyn’s 19th District was stripped of his seat Friday after he was convicted on three of the nine corruption charges he faced.

Sampson was found guilty of lying to federal agents and obstruction of justice stemming from the alleged theft of $400,000 from the sale of foreclosed homes.

He faces up to 20 years in prison.

A one-time leader of the Democratic Conference of the State Senate, Sampson was first elected in 2009 and also served as Minority Leader of the Senate from 2011 to 2013.

Constituents in his district will have to vote for his replacement in a special election. No announcements have been made on when that will happen.