LOCKPORT – A Level 1 sex offender admitted in Niagara County Court Thursday that he failed to inform the state last March that he moved, as required by state law.

Christopher Montgomery, 29, of Willow Avenue, Niagara Falls, pleaded guilty to a felony count of failure to register, and faces as long as four years in state prison when he is sentenced Feb. 28 by County Judge Matthew J. Murphy III.

Montgomery had been living on South Avenue in the Falls, but when police checked the reported address March 19, they found it was boarded up and vacant, Assistant District Attorney Brian D. Seaman said.