A Dorchester man made “disparaging comments” about an acquaintance’s ex-girlfriend, then stabbed him during a fight on the defendant’s back porch last month, killing him, a Suffolk County homicide prosecutor said at the defendant’s arraignment in Suffolk Superior Court today.

THANH VAN TRUONG (D.O.B. 1/1/55) allegedly stabbed 42-year-old Tai Yee six times during a dispute at Truong’s home on the night of June 8. Truong was arrested by Boston Police minutes after the stabbing; Yee died of his injuries later that night and Truong was subsequently indicted for second-degree murder by the Suffolk County Grand Jury, Suffolk DA Daniel F. Conley said.

After successfully recommending $1 million cash bail for the defendant, Assistant District Attorney Jennifer Hickman of Conley’s Homicide Unit told Clerk Magistrate Connie Wong that Yee’s former girlfriend called Yee earlier on June 8. The woman told Yee that Truong “had made disparaging comments about her to a third individual,” which she found upsetting, Hickman said.

Yee called a friend and asked him to go with him to Truong’s Lyon Street apartment to “discuss the situation,” Hickman told the court.

At about 9:30 that night, Hickman said, Yee and his friend arrived at the apartment, entering through an open door on the first floor. Sitting in the living room were Truong and two other men.

Yee, who did not speak Vietnamese, was unable to communicate directly with Truong, a native of Vietnam. Hickman told the court that Yee spoke with one of the other men in the room, telling him that Truong needed to be careful about what he said about people. As the two men were talking, Hickman said, Yee’s friend “observed [Truong] walking to the kitchen, removing a knife, and heading back to the living room.”

“You can’t talk like that about my girl,” Yee said to Truong, following him down the hallway and onto the back porch. Yee’s friend, accompanied by the man with whom Yee had been talking, followed Yee and Truong outside, Hickman said. While the four men were outside, one of Truong’s roommates, who was in his room at the time, heard someone yell in Vietnamese, “Stab that [expletive]!”

Yee and Truong became engaged in a physical struggle on the back porch, Hickman said. During the course of the struggle, Yee “sustained six stab wounds on his face, neck, and arm, with a fatal blow to the chest into the heart down into the liver,” Hickman told the court.

Truong’s friend pulled Yee off the defendant, and Truong ran inside the house, locking the doors. During the struggle, the defendant’s friend sustained a cut to his hand. That man helped Yee to the front of the house, while Yee’s friend called 911.

When Boston Police officers arrived on the scene a short time later, they spoke with Yee, who was still conscious.

“They asked who stabbed him,” Hickman said. Yee responded, “Truong did.”

Officers knocked on the defendant’s door and, when Truong’s friend answered, asked if he had stabbed Yee, Hickman said.

“No,” the friend allegedly said, pointing at Truong. “He did.”

As Truong was being led out of the apartment by police, Yee yelled “He stabbed me! He stabbed me!”

Yee was rushed by ambulance to Boston Medical Center, where he died at about midnight of injuries sustained to his heart and liver.

Catherine Rodriguez is the DA’s assigned victim-witness advocate. Truong is represented by attorney Jack Miller. He is due to return to court on August 24.