Transcript for Veteran New York police detective fatally shot in crossfire
other officers arriving and those detectives were then shot by friendly fire. Plain-clothed detective Brian similar Monson did not survive. Look at this image. NYPD officers standing in the rain as his body was taken away, paying tribute. Here's ABC's Eva pilgrim tonight on how this all happened. Reporter: The dispatch call for an armed robbery at this mobile phone store came just after 6:00 P.M. Male black, all black clothing. About 5'10", 5'11". The perp took two employees to the back of the store. Reporter: Detective Brian Simonsen and sergeant Matthew Gorman, first on the scene, additional police converging moments later. Shots fired! Shots fired! Shots fired, central. He's in the store, he's going to the back. Be advised, I'm shot. Reporter: Police firing more than 40 shots, wounding the suspect, who police say was carrying a fake gun. But caught in the police crossfire, two of their own. Sargeant Gorman, hit in the thigh. Detective Simonson, killed. Make no mistake about it, friendly fire aside, it's because of the actions of the suspect that detective Simonsen is dead. Reporter: Officers from all over the city saluting their fallen colleague. The detective was just two weeks shy of 19 years with the force. I ask that every new Yorker keep Brian's family and the members of the 102nd precinct and every New York cop in their prayers. Reporter: The suspect, 27-year-old Christoper ransom, is a career criminal, police say. They are investigating if he is the man seen here robbing another cell phone store last month. So, let's get to Eva, with us live tonight from the scene. A very difficult Dale for the NYPD and this city, and Eva, we know that friendly fire cases like this one are really extremely rare here in New York step, despite the size and scope of this police force. Reporter: That's right, David. There are more than 36,000 uniformed officers in the NYPD these types of cases are extremely rare. The last time this happened was nearly ten years ago. David? Eva pilgrim tonight. Eva, thank you.
This transcript has been automatically generated and may not be 100% accurate.