There's no such thing as a black and white case. For a simple counter example, you can look up the Outreau case : 12 people were accused of raping and videotap

There's no such thing as a black and white case. For a simple counter example, you can look up the Outreau case : 12 people were accused of raping and videotaping children, with multiple testimonies. And 5 years later, the majority of them were found to be actually innocent. If death penalty was a thing in France, they would have got it for sure, as it was a very emotionnal case at the time. You can also check the movie 12 Angry Men, which is a work of fiction obviously, but still very relevant on why counting on 'black and white cases with extreme evidence' is simply wishful thinking, and will lead to innocent people being killed