A Georgia man stands accused of killing his 72-year-old mother and 73-year-old stepfather in their home after they returned from celebrating the stepfather’s birthday. According to police reports, the man confessed to being “tired of them and just wanted to be alone.”

Martin Duberry, facing charges of two counts of felony murder among other offenses, reportedly could not recall how many times he shot his parents after the initial shots to their heads. This information is detailed in an arrest warrant reported by local police.

The 31-year-old Duberry reportedly called 911 himself following the incident, which occurred on December 6 in Cobb County, as reported by local NBC affiliate WXIA. His mother, Monica Brookins, and stepfather, John Wells, had just returned from Wells’ birthday celebration when they were allegedly shot by Duberry.

Neighbors and friends informed local Fox affiliate WAGA that Duberry had been living with the couple at the time of the incident.

Police cited Duberry’s own statements in the arrest warrant, where he expressed being “tired of them,” which is believed to be the motive behind the tragic event.

Neighbor and friend Kay Hughes shared her disbelief with WAGA, questioning, “Why would somebody shoot two people that when they was letting you live in their house? They just don’t have a heart, I guess.”

Police in the city of Powder Springs, where the couple lived, responded to the home and found Duberry there with his mom and stepdad. The pair was rushed to the hospital with multiple gunshot wounds and pronounced dead upon their arrival.

“I just looked out my window, and I saw a man coming [out] his house with his hands up,” neighbor Sanaa Pygatt told local TV station WANF. “Officers had their guns drawn.”

In addition to murder, Duberry has been charged with eight counts of aggravated battery and possession of a firearm during the commission of a crime. Police described the killings as an “isolated domestic situation.” Cops say Brookins was shot five times, while Wells was shot three times.

“They was always super nice,” Hughes told WAGA about Brookins and Wells. “Always waving to you, always saying hi to you. … They was just good people.”