Forensic science
Forensic science is not immutable. They're not written in tablets of stone, and the biggest mistake that anyone can make—public, expert or anyone else alike—is to believe that forensic science is somehow beyond reproach: it is not! The biggest miscarriages of justice in the United Kingdom, many of them emanate from cases in which forensic science has been shown to be wrong. And the moment a forensic scientist or anyone else says: 'I am sure this marries up with that' I get worried.