It's not enough to know "the rules": you need to understand which ones are most important.
"You don't look in your neighbor's bowl to see if they have more than you: you look in their bowl to see if they have enough." - Louis CK
I don't know exactly what happened in Ferguson, MO this past summer. But I do know this: in the sort of society God wants for us, it won't happen again.
Biblical justice isn't about punishing the bad in people: it's about creating space in society for the good.