Special Agent Oran M. Diemer

Special Agent Oran M. Diemer

Chicago, Burlington and Quincy Railroad Police Department, Railroad Police

End of Watch Wednesday, September 12, 1917

Oran M. Diemer

Special Agent Oran Diemer was shot and killed in Hannibal, Missouri, while he and another railroad detective arrested a man for trespassing on a freight train.

They encountered the man in one of the train's boxcars while it was in transit. He requested to be allowed to purchase a ticket when they arrived at the next city and the detectives stated they would allow him to per the company's policy. When the train slowed as it entered Hannibal the man suddenly produced a handgun and shot Special Agent Diemer in the forehead, killing him. He then shot the second detective several times before jumping from the train near the Main Street crossing.

Despite his wounds, the wounded detective jumped from the train and returned fire at the subject as he fled.


  • Age 27
  • Tour Not available
  • Badge Not available

Incident Details

  • Cause Gunfire
  • Location Missouri
  • Weapon Handgun
  • Offender Not available

Most Recent Reflection

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Agent Diemer,
On today, the 100th anniversary of your death I would just like to say thank you for your service and sacrifice as a Law Enforcement Officer.


United States Border Patrol

September 12, 2017

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