But the overall yearly number of killed officers nationwide is much lower than the 1970s -- an era when violence on police was remarkably high, according to Weiss and Fuentes.
There were 120 officers killed in 2012, 176 each in 2011 and 2010, and 140 in 2009, Weiss said.
Those figures compare with 249 in 1971, 232 in 1972, 273 in 1973, and 279 in 1974, according to the Officer Down Memorial Page website.
Fuentes recalled the 1970s as an era where public respect toward police was low.
"With the Dirty Harry and Charles Bronson and 'Death Wish' movies, it was fair game to shoot cops on the street and there was generally a lack of respect for uniformed officers," Fuentes said. "But over the years, the respect has returned and been earned.
"When respect goes up, the attacks go down," he added.