An email, including a chain of forwarded emails, concerning an Naval Criminal Investigative Service interview of a Las Vegas FBI Special Agent regarding an incident in which the FBI agent is alleged to have been present during an interview between an Naval Criminal Investigative Service agent and a detainee concerning that detainee's report of abuse. The chain generally concerns the "fuzziness" of legality, jurisdiction and procedural guidelines when it comes to external agency interviews of FBI agents. File name: DOJOIG001604.