https://en.m.wikipedia.org/wiki/Crime_in_the_United_States
There's also insurance claim data which requires a police report.
> When the cops don’t show up to take a report it doesn’t show up in crime report statistics.
This is accurate. You appear to be arguing that the reporting is commensurate with actual crime. You haven't provided any evidence of that.
In San Francisco I didn't need the cops to show up to file a report--I filled it out online! It's easier than ever to file a report these days.
https://en.m.wikipedia.org/wiki/Crime_in_the_United_States