Every contact leaves a trace | John Sutherland | TEDxLondon

John talks about his career in London's Metropolitan Police and his experience of depression. He reveals how a principle of forensic investigation, that every contact leaves a trance, applies to all our lives and relationships. John Sutherland is a father of three, who lives with his wife and children in south London. For the best part of twenty-five years, he has served as a Metropolitan Police officer. For the past three years, he has been writing a blog about policing and he has now finished his first book, ‘Blue: A Memoir’. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx