A insurance adjustor with a Little Falls firm on Monday pleaded guilty to his role in a two-year scheme to defraud the New Jersey Turnpike Authority and several insurance companies of $900,000, U.S. Attorney Paul J. Fishman announced. Robert Napolitano, 54, of Clifton, the owner of Dawn to Dusk LLC, an insurance adjusting company in Little Falls, admitted to one count of mail fraud. His sentencing has been scheduled for Jan. 8 in federal court in Newark.