NATCHEZ — Autopsy results show the 20-year-old Natchez man who was found dead in his house Sunday died of a gunshot wound to the back of the head, Adams County Coroner James Lee said.

No gun was found at the home of Terrance Thornburg, and Natchez Police Detective Jerry Ford said Tuesday the department will likely rule Thornburg’s death a homicide.

“We haven’t (officially) said that as of yet, but it’s looking like a (homicide),” Ford said.

Thornburg’s family said Monday that when Thornburg’s body was found, his face was badly beaten. Lee said, however, the trauma to Thornburg’s face was caused by the gunshot to the back of his head.

Lee said a bullet fragment was recovered from Thornburg’s head, but no determination has been made on what type of gun was used in the shooting.

No arrests have been made, and Ford said police are trying to piece together what happened.

Thornburg’s sister, Marquita Thornburg, said her family believes Thornburg was killed during a robbery. Marquita said Thornburg was found on the floor, and the door to his house was partially open.

More than $1,100 was also missing, Marquita said, from Thornburg’s house.

Marquita said she believes the person who killed her brother likely knew he had the money in his house.

Ford said Tuesday police have been unable to confirm any of those details.

Thornburg’s death marks the second homicide of 2014, following the shooting death of Kendrick Tolbert, 28, Jan.2 on Beaumont Street. McKinley Douglas Brady, 34, was charged with murder in connection with Tolbert’s death.

Anyone with information about Thornburg’s death should call Crime Stoppers at 601-442-5000.

Crime Stoppers offers a reward of up to $1,000 for a tip leading to the arrest and conviction of a suspect. Callers may remain anonymous.