Chattanooga Police have charged 41-year-old Wendell Lamont Mitchell with the stabbing death of Jeffery Jackson, 23, at East Lake Courts.
The incident happened July 27.
Police said Jackson was stabbed after he tried to help an elderly man who was being choked by Mitchell.
The victim died soon after being taken to the hospital with a wound to the chest.
Mitchell was located by detectives hiding behind a bathroom door at his mother's house.
He has an extensive criminal record.
Mitchell who is charged with first-degree murder and unlawful possession of a weapon, is being held without bond at the Hamilton County Jail.