Human nature to find quick answers/solutions to problems. When people jump to conclusions, they in essence do more damage, than if they had taken their time to solve the problem.
On top of that.....a truthful person could get humiliated, just because the media interpretation of events and how it's portrayed in written text, which could be bias.
Media(how people learn about events happening) loves to create stories or present skewed views, which can be damaging to an individual's life.
Why do some people get away with murder? Well, that is usually because those who work in Law Enforcement didn't properly do their job. Failure usually causes murderers to be released or found innocent.