In this case it sounds as though AI could have been used to generate preliminary leads. When someone calls a tip line with information, police don’t just take their word for it, they investigate it. They know that tips they receive may be incorrect. They should have done the exact same here, but they didn’t.

I’m very opposed to AI in general, but this one is clearly human failure.

The noteworthy AI angle is the undeserved credence police gave to AI information. But that is ultimately their failure; they should be investigating all information they receive.

...but this one is clearly human failure.

Absolutely.

The failure starts with tool vendors who market these statistical/probabilistic pattern searchers as "intelligent". The Fargo police failed to fully evaluate these marketing claims before applying them to their work.

So in the same way that the failure rolled down hill, liability needs to roll back up.