Seven people were formally charged in Dane County Circuit Court on Tuesday in connection with a homicide on the city's north side earlier this month.
A criminal complaint said the shooting was a planned attack in which one gang was retaliating against another.
Madison police have arrested seven people on homicide-related charges in connection with the death of 20-year-old Jonathan Wilson, who was fatally shot in the 800 block of Troy Drive on Oct. 20.
Another male victim was grazed by a bullet and wasn't seriously injured.
The complaint said the incident started with one person earlier that night chasing a rival gang member's younger brother with a two-by-four.
The alleged triggerman, Demetrius Matticx, 18, is facing a first-degree intentional homicide charge. The six others faces charges of being party to the crime.
The complaint alleges a witness told police that before the shooting, Matticx was intent on revenge, saying, "Ain't nobody going to fight; I'm going to kill." He later added, "I'm not trying to fight anyone with poles and bats. I'm gonna take something worse," according to the complaint.
The complaint described the shooting as a planned attack with at least 10 shooters running and firing weapons on Vera Court. The attackers were wearing masks "similar to the white mask worn by "Jason" in the horror movies," according to the complaint.
All seven suspects are due back in court Nov. 9.