BROOKLYN - Police have arrested a man who they say paid a child $10,000 to falsely testify against a Brooklyn rabbi in a sexual abuse case last year.

The Brooklyn district attorney says Samuel Kellner also falsely testified in the case against Rabbi Baruch Lebovitf, who was convicted in March 2010 of eight counts of a criminal sexual act in the third degree. The crime carries an 11- to 32-year prison sentence.

The district attorney claims that when Kellner found out Lebovitf would be charged, he tried to extort $400,000 from his family and threatened to produce another witness in the case. When the family refused to pay, Kellner allegedly produced a false witness to testify against Lebovitf.Kellner is currently behind bars and faces perjury charges.