The term psychopath is sometimes thrown around to describe someone who is a bit unhinged. In reality, research suggests every one in 100 people meet the criteria to be a true psychopath - which includes antisocial behaviour, remorselessness, deception and interpersonal manipulation.
While that might not sound like a lot, it does mean that we're likely to come into contact with psychopaths regularly - but how can you spot one?
Scientists have come up with five giveaway signs to spot a psychopath, which you can use to work out if you know one.
