The work of the internal affairs unit has long been clouded in secrecy, both for the heightened sensitivity around the investigations it conducts and the state’s protective laws around police personnel files, which are not subject to disclosure under public information laws. Public defenders have accused the office of Baltimore State’s Attorney Marilyn Mosby of further obfuscating the public record of police misconduct by withholding internal affairs files of officers they are putting on the witness stand in criminal cases, though Mosby’s office said it has increased transparency in recent years.