Sorry if I wasn't clear, but to put it lightly, I do not plan on asking the police for suggestions.
That said I think the rest of the ideas are valid.
> Data can be a positive tool to keep everyone
I agree, but data solutions are tricky because there's so much misinformation going on right now. It's really easy for data to be fabricated (other than video (kind of)), and even if it's not, people would (rightly) be cautious to trust it. Data validation might be an interesting problem to tackle but I don't know how you solve that with tech.