Do you know who murdered Demani Allen? In the early morning hours of June 1, 2012, a concerned family member's request for a welfare check led Louisville Metro Police to a home on Gagel Avenue. Inside, they discovered the body of 67-year-old David Thomas Allen, a white male and U.S. Army veteran. An autopsy would later reveal that he had died from multiple gunshot wounds in what investigators believed to be a targeted attack.
The discovery sent ripples of unease through the South Louisville neighborhood, as friends and family grappled with the sudden and violent loss of a man who had been married to his wife, Sue, for 46 years.
The investigation quickly focused on the house next door and its resident, 52-year-old Mark Tatum. Neighbors described a long-standing and escalating feud between the two men, reportedly stemming from disputes over the condition of Tatum's property. The disagreements had grown so severe that Allen had previously complained to city officials about code violations and had even taken legal action against Tatum. This ongoing conflict painted a grim backdrop to the events that unfolded on that fateful morning.
As law enforcement delved deeper into the troubled history between the neighbors, their attention zeroed in on Tatum as the primary suspect. A search warrant was executed on his residence, and the LMPD SWAT team was called to a separate location on Grand Ridge Court where Tatum was believed to be. After a tense standoff, Tatum surrendered to authorities without incident. He was subsequently arrested and charged with the murder of David Thomas Allen.
Mark Tatum's legal proceedings brought the full extent of the animosity between the two men to light. Prosecutors argued that the persistent complaints filed by Allen had pushed Tatum to a breaking point, leading him to shoot his neighbor. In 2016, a jury found Mark Tatum guilty of murder. He was sentenced to 35 years in prison for the crime, bringing a measure of closure to a tragic story that began with neighborhood disagreements and ended in a senseless death.
