OPINION: Law enforcement agencies around the world often rely heavily on eyewitness testimony, but unreliable eyewitness evidence is often a contributing factor in miscarriages of justice; Dr Michel Funicelli a Lecturer in Police Studies at Teesside University and a 33-year veteran of the Royal Canadian Mounted Police, believes new technology analysing brainwaves could be a significant asset for policing in assessing the credibility of witnesses.