Ft Worth police officer shoots woman to death inside her home

You would base it off of interactions, no?
Traffic stops, 911 calls, et al

Yes, and generally speaking it's going to be 1:1. One police officer to one civilian per interaction. I realize that sometimes you'll have fewer officers than civilians, and vice versa. But directionally you're going to have a similar number of civilian police encounters as you have police civilian encounters.

So those stats show that in any interaction where you have a police officer and a civilian, the civilian is about 30x more likely to die than the police officer.