[ch4s3]

>Our main point is that there is still a real and often growing problem with violent crime

That's just it though, the data do not support this claim. The general trend is decreasing crime. In fact the sole source you cite says:

>Many crime experts warn against reading too much into recent statistics. In fact, murder rates remained largely unchanged in 70 cities, and decreased significantly in five. “Even if the uptick continues in some cities, I doubt the pattern will become universal,” Dr. Sampson said.

And sure, you have some positive feedback, great. But how often has your app been misused? How "concerned citizens" mistaken an innocent person as having been involved in a crime? What about the privacy of victims of crimes? How do you store your data? How do you ensure privacy? Do you give data to law enforcement? Without warrants? Do you disclose any of this data? What do you do to protect extra sensitive data like domestic abuse, and sexual assaults?

Why should we trust you?