A teenager who brought an air-propelled replica revolver loaded with metal bullets to school last week was under the supervision of a social services agency.

Sabir Duncan Johnson, 18, remains in Carbon County prison under $100,000 straight cash bail after bringing the Black Ops Airsoft revolver, loaded with six metal bullets, to Jim Thorpe Area High School on Nov. 27.The address listed for Johnson on an affidavit of probable cause, filed by Jim Thorpe Detective Lee Marzen, is 2605 State Route 903, Albrightsville. The address is that of ChildFirst Services Inc.The Bethlehem-based agency, formerly Spectrum Human Services, provides group homes, supervised independent living arrangements, and foster care for children who are referred by Children and Youth Service agencies and juvenile probation offices.The reason for Johnson's supervision is unclear. A woman who answered the telephone at the agency Monday declined to comment, and no one answered the door of the building on Route 903 Monday afternoon.School Superintendent Barbara Conway said that about a dozen children supervised by ChildFirst attend the high school.Jim Thorpe Police Chief Joseph Schatz said early Tuesday that the revolver was made of metal, and that it was loaded with metal BB type bullets."We've confiscated some Airsoft guns from people on the street. They could definitely inflict injury," he said.Police also found a detachable laser pointer for the revolver in Johnson's front pocket.According to the affidavit, Johnson showed the gun to two girls in his classroom. The girls alerted school authorities, who locked down the building for two hours as police searched for weapons.During the lockdown, Johnson hid the gun in a binder under a table.He faces misdemeanor charges of possession of a weapon on school property and disorderly conduct.