Any person who knowingly makes any false statement or who falsifies or permits to be falsified any record of the retirement system in any attempt to defraud that system is guilty of a misdemeanor and, on conviction thereof, shall be punished by a fine not to exceed $1,000, by confinement in jail not to exceed one year, or by both fine and confinement. Any increased benefit received by any person as a result of the falsification or fraud shall be returned to the fund on demand by the board.