In a surprise move on Friday, New Jersey’s top law enforcement official took over the Warren County Prosecutor’s Office, installing a deputy to head the agency and announcing the current prosecutor’s immediate resignation. State Attorney General Matthew Platkin said in a statement he was replacing James Pfeiffer, who has run the office since 2019, “effective immediately.” The attorney general did not provide a reason for the ouster. A spokesman later told NJ Advance Media the move followed an investigation “into misconduct by members of the Warren County Prosecutor’s Office” by the state Offic…