The would-be robber who opened fire on police Monday before ending his own life [/robbery-shooting-on-quentin-road-and-east-36th-street/] had a history of violence, including the 1993 kidnapping of a police officer, according to the Daily News [http://www.nydailynews.com/news/ny_crime/2010/04/28/2010-04-28_thug_who_killed_self_had_violent_