(Adds comment from Kontogiannis's lawyer in the fourth paragraph.)

 
   DOW JONES NEWSWIRES 
 

A New York real-estate developer pleaded guilty to defrauding Washington Mutual, now part of J.P. Morgan Chase & Co. (JPM), and a subsidiary of Credit Suisse Group (CS, CSGN.VX) as part of a $92 million mortgage scheme, according to the U.S. Justice Department.

Thomas Kontogiannis pleaded guilty to conspiracy to commit bank and wire fraud in federal court in Brooklyn on Friday. The charges were connected to two New York developments, one in Brooklyn and one in Queens.

U.S. Attorney Loretta E. Lynch called the mortgage fraud "staggering" in its scope. New York Superintendent of Banks Richard H. Neiman said it was "one of the largest mortgage frauds directed by a single individual."

Kontogiannis's attorney Gregory O'Connell said his client had taken full responsibility for the matter and "expressed his sincere remorse and hopes to put this difficult manner behind him."

He declined to comment on whether Kontogiannis was cooperating with authorities in the case.

Kontogiannis is already currently serving a 97-month prison sentence after pleading guilty in 2008 to money laundering. Prosecutors had alleged Kontogiannis helped former U.S. Rep. Randy "Duke" Cunningham to launder bribes.

Cunningham was sentenced to more than eight years in prison in February 2008 after pleading guilty in 2005 to accepting $2.4 billion in bribes.

Kontogiannis's indictment said that he employed family and workers who acted as straw buyers on properties he owned and directed false loan files. The mortgages included false appraisals and other documentation. After the loans closed, Kontogiannis prevented the mortgages and deeds from being recorded, so he could sell the same property repeatedly. He eventually sold the loans to Washington Mutual or the Credit Suisse unit, DLJ Mortgage Capital Inc., according to the charges.

Kontogiannis was indicted in June 2009, along with eight others. His guilty plea is the fifth in the case.

He faces up to 30 years in prison for the conspiracy count. He has also agreed to forfeit proceeds from the alleged fraud, including a criminal forfeiture money judgment and money traceable to four commercial properties he controlled worth at least $50 million.

-By Joan E. Solsman, Dow Jones Newswires; 212-416-2291; joan.solsman@dowjones.com

(David Benoit contributed to this article.)