A Dorchester man was held without bail today following his indictment for allegedly shooting 28-year-old George “Jeffrey” Thompson to death in Thompson’s Dorchester home following an argument, Suffolk County District Attorney Daniel F. Conley said.

OMAY TAVARES (D.O.B. 4/24/89) was arraigned in Suffolk Superior Court today on charges of first-degree murder, possession of a firearm without a license as a subsequent offense, carrying a loaded firearm, and two counts of unlawful possession of ammunition, all in connection with the Jan. 7 inside Thompson’s Rosseter Street residence.

At the time of the shooting, Lundgren said, Tavares was on probation after serving an 18-month jail sentence for an unrelated firearm possession conviction.

Lundgren told the court that at, about 8:45 on the night Thompson was shot, a friend of Thompson was leaving the victim’s first floor Dorchester apartment.

“As this friend was exiting the main door to 87 Rosseter St., he ran into a young, tall, light-skinned black male, wearing a grey hoodie, waiting outside with a phone in his hands,” Lundgren said. This individual identified himself as “O” and indicated he was there to see Thompson, Lundgren told the court.

“Mr. Thompson’s friend went back into the apartment to let him know that ‘O’ was at the front door,” the prosecutor said. Thompson acknowledged to his friend that he had been waiting for “O” – later identified as the defendant, Tavares – and let him into the apartment after his friend left.

Tavares and Thompson began a conversation in the kitchen while another person sat in the living room of the apartment. The conversation turned into an argument, Lundgren said, and the witness went into the kitchen to see what was happening.

When the witness went into the kitchen, Lundgren said, she saw Tavares holding a handgun. When she tried to run for the door, Tavares “pointed the gun at her and said, ‘Don’t you go, just wait,’” Lundgren told the court.

“She pleaded with [him] … not to shoot,” Lundgren said, and was able to flee toward the sliding doors in the rear of the apartment. As the witness fled, she heard several gunshots fired, Lundgren said.

Boston Police officers who responded to the scene found Thompson dead of injuries to his arms, chest and head. Ballistics experts were later able to determine that Thompson had been shot with a 9mm handgun.

In the days following the shooting, Boston Police homicide detectives obtained phone records indicating that Tavares had used a cell phone in the area of Rosseter Street shortly before the shooting and later near his Idaho Street home.

Those records, together with witness identifications and forensic evidence found at the scene, led Boston Police to seek a warrant for his arrest. Suffolk prosecutors approved the arrest warrant on Jan. 15; police arrested him at home later that day. During the execution of a search warrant on his residence, Lundgren told the court, detectives recovered marijuana and ammunition from the defendant’s apartment.

Catherine Yuan is the victim-witness advocate assigned to the case. Tavares was represented by attorney James J. Coviello. A video bail review is scheduled for May 13; he is expected to return to court on May 20 for a pre-trial conference.