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In the Line of Duty
Mark Keller, 59 - Mesa, Arizona
5/6/2025
Mark Keller Firefighter/Paramedic Mesa Fire and Medical Department Mesa, Arizona Age: 59 Sex: Male Classification: Career Years of service: 35 Date of incident: May 6, 2025 Date of death: May 6, 2025 The Mesa Fire and Medical Department received an early morning emergency call. When Firefighter/Paramedic Keller did not get on the truck, crews went to wake him and found him deceased on the floor.