Yes. My reference is in my reply #30. One link. There are of course many others but I will provide only the one link. It seemed reliable though it was through CNN. I used google search and searched for, policemen deaths u.s.
Let’s take a look at the facts as provided by the Bureau of Labor Statistics (http://www.bls.gov/iif/oshwc/cfoi/cftb0242.pdf) for 2009.
In ALL industries there were 542 homicides in 2009 - 462 were in private industry. Areas included construction, manufacturing, wholesale trade, retail trade, transportation and warehousing, professional and business services, administration, leisure and hospitality.
There were 80 homicides in government. 18 were in the federal government. 7 were in state government, though none were police. Local government had 55 homicides, of which 48 were public safety, aka police. Curiously more police died in traffic accidents than were shot.
So, the implication that police have a particularly hazardous occupation is not borne out by the facts.