The 9th Circuit disagrees with that assessment. We ran afoul of them when one of our all civilian undercover CP platforms found a non-DOD nexus offender and related the info to a local jurisdiction for action. 9th Circuit threw the case out because of Posse Comitatus - saying NCIS is part of the "military" and therefore can't enforce civilian laws. I lost the bubble on whether or not that case was ever appealed higher.