General Guidance: Contacts with Law Enforcement
There are occasional instances in which members of the physics community may be contacted by agents of various Federal, State and local law enforcement agencies. Interviews of this kind are, for the most part, related to security clearances of colleagues or other routine matters. However, in some cases, these events may be stressful, particularly for colleagues who may not feel familiar with US law and their specific rights. For this reason, the Stanford Office of the General Counsel has put together a helpful document that is available here.