Re:5th (Score 5, Insightful)

Just to play devil's advocate, the courts could argue here in the US that brain scans are evidentiary, and not testimony (hence witness against one's self). My guess is they would argue that brain scans are of the same family of evidence as DNA; e.g. it doesn't "testify against you", but is rather physically relevant to the case. I would hope that this would cause outrage, but judging by the number of other things the government has desensitized us to, it wouldn't surprise me.