mma fighter sergio da sylva pled guilty robbing nyc bank mma fighter sergio da sylva plead guilty robbing bank mma fighter sergio district attorney sylva pled guilty robbing nyc bank summer tmz sports learned officials say silva fought bellator busted citibank nance august claiming gun threatening shoot whoever cooperate cops say silva got away around cash silva arrested supercharged felony robbery charges including degree looting displaying firearm sds attorney saint david fish tells us intend establish trial helium guilty hes alleged give allegations serious think sergio lot confidence truth come trial silva present nyc court plead shamefaced charges due back court april