Colby Ryan Deck, 27, was fatally shot at a residence on 510 Morgan Street in Keokuk, Iowa, on the morning of July 28, 2024. Emergency responders arrived after two 911 calls reporting a man with a gunshot wound; Deck was found with a single gunshot wound to the chest and was pronounced dead at about 9:39 a.m.

Investigators from the Keokuk Police Department and the Iowa Division of Criminal Investigation processed the scene, executed multiple search warrants and collected evidence. Early inquiry identified the person who fired the fatal shot but the name was not released while the investigation continued. Forensic work later linked a shell casing found in a rain gutter outside an open second-story window to a handgun owned by the suspect.

On April 17, 2025, 27-year-old Matthew Thomas Miller was arrested at a Morgan Street residence and charged with Murder in the Second Degree. Investigators say Miller’s initial account—that he fired from ground level near a vehicle after Deck struck it—was inconsistent with witness statements and physical evidence, and that evidence indicated the shot was fired intentionally from the second-story window.

Does anyone have information about Deck’s movements that morning or about anyone seen around Morgan Street that day?