I had an idea what about a Holiday that instead of killing anyone or committing a crime you confess to one and on that day or after as long as the confession was given on that day you could never be prosecuted for it.
Think about it:
All the murders and crimes that go unsolved would be solved, thousands if not millions of dollars and resources could be freed up.
People who have victims could finally get validation maybe even healing.
Courts and cases could be less of a burden afterwards and leading up to the Holiday.
Law enforcement could learn to be more effective by finding out how certain crimes happened.
What do you think of a Purge: Confession Day? No religious tones intended or implied and it could also extend beyond just legal responsibility.