Many police departments have upper IQ limits for officers that’s only slightly above average. Since leadership is promoted from internal ranks, that also causes ineffective leadership.
https://abcnews.go.com/US/court-oks-barring-high-iqs-cops/st...
Obviously this is not ideal at the police level (who should find the truth, not someone to blame) but some more accountability is warranted within the judicial system too. All incentives here are perverse, yet lack of them results in fuckall getting done.