"The rate of fatal work injuries for police officers in 2014 was 13.5 per 100,000 full-time equivalent workers, compared to 3.4 for all occupations. Similarly, the rate of nonfatal occupational injuries and illnesses involving days away from work among police officers was 485.8 cases per 10,000 full-time workers in 2014; the rate was 107.1 cases for all occupations."
Police Officers Factsheet
The difference that you are failing to see is that police knowingly place themselves in danger. You, as an EM physician, do not. Though you have implied that you do. I guess you moved on from that argument?
Edit: Added quotations and wanted to suggest that you don't quote national stats relative to police deaths and then make the comparison to big city, urban murder rates. Apples and oranges, friend. Or was that intentional?