Addyston Police Department {"lat":"39.1367250","lon":"-84.7091140","name":"Marshal Henry Knapp","url":"https:\/\/www.odmp.org\/officer\/7629-marshal-henry-knapp","eow":"Sunday, March 14, 1926","img":"https:\/\/www.odmp.org\/media\/image\/officer\/7629\/125\/henry-knapp.jpg","agencyLoc":"Addyston Police Department, OH"} Marshal Henry Knapp Addyston Police Department, OH EOW: Sunday, March 14, 1926 Cause: Gunfire Total Line of Duty Deaths: 1 Gunfire 1 By Month March 1 By Gender Male 1 Female 0