Prohibits release of illegal immigrants from correctional facilities.

New Jersey's S 851 requires correctional facilities (prisons, jails, youth detention centers) to verify the citizenship and legal immigration status of every inmate. If an inmate is not a U.S. citizen or cannot be confirmed as lawfully present, the facility must not release them - except to federal immigration officials - and must document this determination. Violations by facility staff could result in civil penalties set by the Corrections Commissioner. The bill directly affects non-citizen inmates and correctional facility operators, aiming to prevent releases into the general population for those unlawfully present in the U.S.