I don't think we're getting the whole story here. So I can't judge what truly happened, but on the surface this sounds like the cops FUBAR'd on this big time.
OTOH, in their defense, in the first property I purchased and rennovated, the old lady next door turned out to be a drug dealer. I learned this after the first raid on her property. We sold not too long after that to what looked like a group of people or families that wanted to live in the house. To top it all off, she complained to me about them being foreigners.
I don't either. And I don't think we're going to for a while . . . if ever.