You are missing out the entire point. In a justice system, a single innocent in prison is a thousand times worse than a free criminal. This is where most people draw the line if they think about it. Because when you put innocents under arrest, suddenly you are no better than dictatorships and terrorist state.

The real justice is investing in a security system that tracks, investigates, and condemn actual criminals, in a targetted way, so that honest people can live securely and free. Believe it or not, plenty of countries manage to do that pretty well.