When I was in interrogation school in the US Army, we were told we were only allowed to interrogate non-US citizens off US soil. However, even if a US citizen t

When I was in interrogation school in the US Army, we were told we were only allowed to interrogate non-US citizens off US soil. However, even if a US citizen told us they were a US citizen off US soil, we were allowed to say they "were lying" (and any documents are counterfeit) and interrogate them anyway.