In the study of physics, there is a fundamental law of nature called the second law of thermodynamics, also known as the law of entropy. Simply put, the law states that, as time goes on, the world around us naturally evolves into a state of higher disorder. Think about your desk at work.
If God forbid, one of your loved ones was killed by another human being, would you want the true killer to be brought to justice? Or would you settle for someone who the government says is the perpetrator but is actually innocent?