I'll leave it at imperil. You can argue skewed coverage, but from where I sit, being approached by police in the situation described seems extremely dangerous.

We're already into several iterations of the feedback loop. In a world where police works properly, you should not be afraid of being approached by them in the first place. An officer should ask you a few questions in a civilized manner, the whole encounter going like two adults talking about their common interest (catching the bad guy).

So coming and approaching is the right thing, but we need to work on reducing fear both sides have of each other first.

I agree that there's danger there, but what's the workable alternative? Never stop and contact anyone until their identity or involvement can be 100% verified prior to contact?