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ANTIOCH, IL - SEPTEMBER 07: With his son (maroon beret) calling commands, the coffin of slain Fox Lake police officer Lt. Joe Gliniewicz is carried into Antioch Community High School for his visitation and funeral service on September 7, 2015 in Fox Lake, Illinois.  Gliniewicz was shot and killed on September 1, while on duty in Fox Lake. Police are searching for three suspects in connection with his death.  (Photo by Scott Olson/Getty Images)
ANTIOCH, IL - SEPTEMBER 07: With his son (maroon beret) calling commands, the coffin of slain Fox Lake police officer Lt. Joe Gliniewicz is carried into Antioch Community High School for his visitation and funeral service on September 7, 2015 in Fox Lake, Illinois.  Gliniewicz was shot and killed on September 1, while on duty in Fox Lake. Police are searching for three suspects in connection with his death.  (Photo by Scott Olson/Getty Images)

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    'Hero Cop' staged his own suicide

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'Hero Cop' staged his own suicide

Officials say Lieutenant Joe Gliniewicz was not ambushed and killed by three suspects but carefully staged his own suicide to look like a murder. CNN's Pamela Brown reports.

'Hero Cop' staged his own suicide

Officials say Lieutenant Joe Gliniewicz was not ambushed and killed by three suspects but carefully staged his own suicide to look like a murder. CNN's Pamela Brown reports.