N.J. Stat. Ann. § 18A:6-4.16

4. The commissioner may maintain the criminal record and application documents on a candidate for no longer than three years from the date of a determination as to the candidate's qualification or disqualification for employment with an employer. The three-year retention limitation shall not apply to statistical data on crimes and any other offenses or an ongoing list of candidates who are qualified or disqualified. All documents submitted by a candidate and all criminal history record information shall be maintained by the commissioner in a confidential manner.