Google Docs sets browser cookies. If you have a surprise raid with logged-in workstations, you have access to Drive documents as well.
[1] http://www.cnet.com/news/spain-says-it-has-arrested-anonymou...
Isn't that backwards?
They also have gear that can splice into the power cord of a live machine without interrupting the flow-- the combination of these two devices allows them to seize unlocked computers and keep them accessible while taking custody of the machine.
I'm not sure if opening a Google Doc from the local file system would work without a connection.
I mean, you could do it it software too, but it would look cool and send a signal to the officers. :-)
Or you could keep the door locked.
Sounds like a lose-lose scenario, to me.