(been away from a computer for a week so haven't had a chance to see this, apologies for the late reply)
I am sorry but your numbers seem all forms of shady.
Your 'killed by police' number seems wildly off. I have found no 'definitive' source but the best numbers I have seen say between 350 to 750 people a year are killed by officers. I would be interested where your number for this actually came from as you are putting this at 2x the high number I have been able to find.
Your first two stats show a clear risk assessment. The average person is over 10x more likely to be killed by a non-cop than a cop. This takes into account everything. Add in other forms of crimes and they are clearly the greater risk. After this at best you could classify people into 'more likely' and 'less likely' groups.
After this you supply 'arrests per year' and 'number of police' do derive 'arrests per officer per year'. Mathematically valid up to this point but meaning less when compared with murdered numbers per year.
Now you perform your magic 'adjustment'. Here is where I cant even fathom what you are thinking. So, per every 100,000 officers you hare a 5.6% chance of one of the people they arrest being murdered? I think maybe that is what you are saying? What does that even mean?
I am sorry, but you seem to be trying to bend the numbers to meet your preconceived notion here.
If you wanted something to support where I think you were going you should compare felons vs murders and cops vs murders. At 20m felons presumably committing 5 murders per 100,000 people we get
Now that we have some fact that seems to support that cops kill more people per capita than felons do, I can now say: Who care? Be good and you will have limited interactions with cops. When you interact with cops be aware and don't do anything aggressive and you have a very low chance of being hurt by a cop. Yes, there is always a chance, but the chance is small.
I have in the past (and chances are it will continue into the future) been the victim of several moderate to petty bad crimes. The worst I have gotten from a cop is tongue lashing. I am sorry, but criminals are a much greater danger than the cops (at the current time, in the USA).