Franklin Zimring quoted in The Arizona Republic, January 8, 2013
Nationwide, an average of 113 officers were killed each year during the 1970s. “And there were fewer cops then, too,” Zimring said. “The long-term trend in killing of police is downward, not upward, and my impression is that when you look at the killings now, what you see is fluctuation at what is a relatively historically low level.”