Updated at 12:50 p.m. Sept. 11: Revised to include the identity of the dead man, additional information.

A Garland man fatally shot a man who tried to rob him and his girlfriend at gunpoint during the sale of a camera, police say.

Officers were called to a shooting at a home in the 3700 block of Hawaii Drive, near Apollo Road, just after 10:30 p.m. Sunday and found a man in the front yard who had been shot.

Police said that Quan Tran, 23, and his girlfriend were outside their home waiting to meet someone to buy a camera that had been advertised online.

While they were waiting, a man showed up and demanded money at gunpoint. Tran pulled out a handgun and shot the man, police said.

Alexander Clair Bessenecker (Garland Police Department)

Paramedics were called to the home, but the man died in the yard.

Authorities identified the man Tuesday as Alexander Clair Bessenecker, 39.

Bessenecker was sentenced to probation in 2015 for an assault in Tarrant County. At the time of his death, he was awaiting trial in Dallas County on two drug-possession charges and one count of credit-card abuse. He had also been arrested in Denton County in August on a drug charge.

Tran was detained by police, but no charges have been filed. Police are continuing to investigate.

Authorities recommend that people buying and selling items online meet at a police department's safe exchange zone or a fast-food restaurant rather than a home.