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LOS ANGELES, CA - FEBRUARY 07: A picture provided by Los Angeles Police Department of alleged suspect Christopher Dorner is displayed during briefing on February 7, 2013 in Los Angeles, California. A former Los Angeles police officer Christopher Jordan Dorner, 33, who had allegedly warned he would target law enforcement, is suspected three police officers killing one. Dorner is also a suspect in two weekend killings of Monica Quan and Keith Lawrence who were found dead in a car inside a parking structure. (Photo by Kevork Djansezian/Getty Images)
LOS ANGELES, CA - FEBRUARY 07: A picture provided by Los Angeles Police Department of alleged suspect Christopher Dorner is displayed during briefing on February 7, 2013 in Los Angeles, California. A former Los Angeles police officer Christopher Jordan Dorner, 33, who had allegedly warned he would target law enforcement, is suspected three police officers killing one. Dorner is also a suspect in two weekend killings of Monica Quan and Keith Lawrence who were found dead in a car inside a parking structure. (Photo by Kevork Djansezian/Getty Images)

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Fired cop's 'last resort' manifesto

CNN's Mallory Simon reports on former L.A. police officer Christopher Dorner's state of mind as expressed in his letter.

Fired cop's 'last resort' manifesto

CNN's Mallory Simon reports on former L.A. police officer Christopher Dorner's state of mind as expressed in his letter.