His death remains under investigation by Dayton police.
Emergency crews were called to a house in the 1200 block of West First Street at about 12:50 p.m. on a report of a man shot inside the home, according to Montgomery County Regional Dispatch Center records.
Records said that the man was shot in the back, and a 911 caller said that he stopped breathing.
“Upon arrival officers located the victim, a 21-year-old Black male,” said Lt. Steven Bauer. “He was transported to Miami Valley Hospital where he was pronounced deceased.”
The initial investigation indicates the victim and suspect were known to each other, he added.
On Monday, Dayton Police Information Specialist James Rider said said the shooting was not a random act of violence.
Dispatch records said that the shooting may be a dispute over a woman, who was in the home with children at the time of the incident.
Anyone with information should call police at 937-333-1232 to speak to a detective. People can report tips anonymously to Miami Valley Crime Stoppers 937-222-STOP (7867) or by visiting www.miamivalleycrimestoppers.com.