Double jeopardy is a legal principle that somebody cannot go on trial for the same crime more than once. The rule, over 800 years old, was put in place to protect the innocent against judicial misconduct that could see them convicted, even after being found not guilty. A pivotal shift occurred twenty years ago, with the UK's double jeopardy law undergoing a significant transformation through the Criminal Justice Act 2003. This introduced substantial reforms, particularly for serious crimes. The amendment allowed the possibility of retrial for someone previously acquitted, if "new and compelling" evidence surfaced…