The friendly-fire police shooting that left an NYPD detective dead and a sergeant wounded was an anomaly amid a dramatic decrease in police-involved shootings in recent years, data shows. When NYPD Det. Brian Simonsen was killed in a barrage of friendly fire while responding to a robbery on Feb. 12, police officers had fired 42 shots in just 11 seconds. But incidents like this are increasingly an "aberration," NYPD officials say, and the vast majority of arrests take place without shots being fired. Read more: nbcnewyork.com/investigations/NYPD-Police-Involved-Shootings-Decrease-Dramatically-NYC-506524881.html NBC 4 New York on Twitter: 4.nbcny.com/kAuuwUN NBC 4 New York on Facebook: 4.nbcny.com/mbeh714 NBC 4 New York on Instagram: 4.nbcny.com/g5YlkcI NBC 4 New York on Youtube: 4.nbcny.com/iTUpy5e #NYPD #Police #Investigations #ITeam #News