I like to think I have a great memory, but apparently we're all capable of creating false ones we're convinced are genuine. This is annoying in everyday life, but a major problem with eyewitnesses in court.
Psychologists have found that eyewitness who are very confident on first identifying a suspect are more likely to be remembering accurately. Those who are initially uncertain are more likely to have created a false memory by the time they're in court.
The research is fascinating - but we need more evidence before we'll know when we can trust eyewitnesses.