I know a cop, they do public searchings for weapons or drugs. Our law dictates fairness. So every now and then they search an elderly couple. You know how this goes and what the results are.

Any model would be unfair, age-wise but also ethnically.

To be most effective the model would have to be unfair. It would suck to be a law abiding young specific ethnic minority.

But does it help to search elderly couples?

I’m Genuinely curious what would be fair and effective here. You can’t be a Bayesian.