Even accounting for that rate, police faces 5x "prosecutable assults" more than a "reported assult" on a normal person. We don't know what "prosecutable assult" statistics on a normal person so we can't compare them directly, but the rate is approx. 67%[1]. Clearance rate is 52%, so it shows that while policing in US, you get approx. 15x more chance of facing "prosecutable assult".
[1] https://www.bjs.gov/content/pub/ascii/scpdvc.txt