Brain Scans for Eyewitnesses

Our memory plays tricks on us when we try to recall witnessing a crime [BBC]. So to circumvent that they're suggesting scanning people's brains to see if they actually recall something or whether they've just been addled by suggestion from other people, the police in particular.

Trouble is, I'm a jaded old beast. If they scanned my brain whilst trying to determine whether I remembered a murderer's coat when shown, they'd probably find I was thinking about Barbara Flynn in the nude or whether I would be leaving the station before the pubs close.