More on "assault rifles," Brady, and officer slayings
Snowflakes in Hell has further analysis of data on the question. As I'd noted a bit earlier, rifles of any type were involved in a small minority of LEO killings. He looks deeper into the data -- which doesn't give weapon type, but does give caliber -- and notes that in 2006, chamberings associated with "assault guns" were involved in a total of four LEO deaths. Since these chamberings are also used in rifles that aren't within most definitions of "assault rifles," the actual number may be lower. The most we can say is that in 2006, two years after the "assault rifle" ban expired, it is likely that the number used in LEO slayings was 0-4.
No wonder the CNN article, the newspaper piece, and the Brady Campaign claims that police are faced with a wave of AW attacks didn't quote any figures....