Did violent crime double and make communities more dangerous?

1) What kind of claim is this?

This is a statistical increase claim with a safety conclusion.

2) What context is assumed or missing?

The starting level and data source are not described.

3) What has to be true for this to work?

The increase must be large, accurate, and widespread.

4) When would this not hold?

The claim weakens if the rise is local, short-term, or from a low base.

5) What follows if we accept it?

Public fear and demand for action may increase.