If you're going to factor in human error in regards to roofing accidents, you have to factor it into police injuries, too. Otherwise we're just skewing the numbers to make police work seem more dangerous, right? Human error applies to both categories. Some roofers get a little careless, some cops start acting like cowboys out there and making the job more dangerous for themselves and their fellow officers.

"...the successful annihilation of organized crime's subculture in America would rock the 'legitimate' world's foundation, which would ultimately force fundamental social changes and redistributions of wealth and power in this country. Meyer Lansky's dream was to bond the two worlds together so that one could not survive without the other." - Dan E. Moldea