This July 2012 photo shows Andrew Engeldinger working at Accent Signage in Minneapolis. Police say the gunman who killed four people inside a Minneapolis sign company had been fired hours before the attack. Minneapolis Police Chief Tim Dolan told a Friday, Sept. 28, 2012, news conference that the gunman in Thursday's attack was 36-year-old Engeldinger of Minneapolis. (AP Photo/Finance and Commerce, Bill Klotz) MANDATORY CREDIT

Associated Press
This July 2012 photo shows Andrew Engeldinger working at Accent Signage in Minneapolis. Police say the gunman who killed four people inside a Minneapolis sign company had been fired hours before the attack. Minneapolis Police Chief Tim Dolan told a Friday, Sept. 28, 2012, news conference that the gunman in Thursday's attack was 36-year-old Engeldinger of Minneapolis. (AP Photo/Finance and Commerce, Bill Klotz) MANDATORY CREDIT
This July 2012 photo shows Andrew Engeldinger working at Accent Signage in Minneapolis. Police say the gunman who killed four people inside a Minneapolis sign company had been fired hours before the attack. Minneapolis Police Chief Tim Dolan told a Friday, Sept. 28, 2012, news conference that the gunman in Thursday's attack was 36-year-old Engeldinger of Minneapolis. (AP Photo/Finance and Commerce, Bill Klotz) MANDATORY CREDIT
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