For ten years, apparently, there was some great police work in that community. NOT!
I know about a half dozen families on my street of 60+ houses and that was because we made an effort to get to know them. This isn't the world of 60 years ago or even 30 years ago. We've taken "mind your own business" to the level of "don't know anything about anyone." I would assume that makes committing crimes like this easier and police work more difficult.
Obviously we don't want 1984 with neighbors turning each other in for thought crimes but I'd like to know if the guy next door kidnapped three teenage girls and chained them up in the basement.