Yes, I agree that this could be an excellent opportunity to pass needed info to the criminal authorities.

But we must have some assurance that it is really the POLICE that we're communicating with:

1: If it is NOT the police, then the information will not have reached the intended recipients, and our having tried to be good citizens will have been all for nothing.

2: What if some malicious person impersonates the police in an attempt to get information?

3: I have never heard of any real criminal authority not giving out VERIFIABLE contact numbers to the public.

It just doesn't ring true . . .