Subject to subsections (b), (c), and (d) of this section, a custodian may deny inspection of: records of investigations conducted by the Attorney General, a State’s Attorney, a municipal or county attorney, a police department, or a sheriff; an investigatory file compiled for any other law enforcement, judicial, correctional, or prosecution purpose; records that contain intelligence information or security procedures of the Attorney General, a State’s Attorney, a municipal or county attorney, a police department, a State or local correctional facility, or a sheriff; or records, other than a record of a technical infraction, relating to an administrative or criminal investigation of misconduct by a police officer, including an internal affairs investigatory record, a hearing record, a record of positive community feedback, and records relating to a disciplinary decision. A custodian may deny inspection by a person in interest only to the extent that the inspection would: interfere with a valid and proper law enforcement proceeding; deprive another person of a right to a fair trial or an impartial adjudication; constitute an unwarranted invasion of personal privacy; disclose the identity of a confidential source; disclose an investigative technique or procedure; prejudice an investigation; or endanger the life or physical safety of an individual. A custodian shall allow inspection of a record described in subsection (a)(4) of this section by: the United States Attorney; the Attorney General; the State Prosecutor; or the State’s Attorney for the jurisdiction relevant to the record. Except as provided in subsection (c) of this section, a custodian: shall redact the portions of a record described in subsection (a)(4) of this section to the extent that the record reflects: medical information of the person in interest; personal contact information of the person in interest or a witness; or information relating to the family of the person in interest; and may redact the portion of a record described in subsection (a)(4) of this section to the extent that the record reflects witness information other than personal contact information. A custodian shall notify the person in interest of a record described in subsection (a)(4) of this section when the record is inspected, but may not disclose the identity of the requestor to the person in interest.