They fear scans which are already used in some death-row trials in the US could be used by British police to determine whether a suspect is lying, or has planned a crime they have yet to commit.
Scottish academics and legal experts have warned that the use of brain scanners must be regulated to prevent threats to civil liberties.
They fear scans which are already used in some death-row trials in the US could be used by British police to determine whether a suspect is lying, or has planned a crime they have yet to commit.