You're probably at a lower risk of being murdered with a bad cop than with your own family members.
Sure, and I’m much more statistically likely to be hurt by a dog than mauled by a lion. But I’m not going to give up my dogs and start wandering into lion cages at the zoo.
With travel, we often talk about deaths per x miles traveled. I think in this case a reasonable metric would be deaths or injuries per x minutes of interaction.
(You interact with your own family members many orders of magnitude more often than with the police; as such, raw numbers here would be wildly misleading.)
If you have a cop as a family member, you are at an elevated risk of each of those, and much of that is the special risk of getting both simultaneously.