A 12-year-old boy was among the occupants of a vehicle allegedly fired upon by Armonta Dquon Hadnot on March 20, according to a bill of indictment returned Friday by a grand jury in 14th Judicial District Court.

Hadnot, 18, was indicted on 15 charges related to two incidents on March 20, the latter of which left three people dead.

Police have called Hadnot the main suspect in a triple homicide at McMillan Park. Authorities said Hadnot and another shooter killed 20-year-old Jeminskian J. Arvie, 22-year-old David Jermaine Galmore and 20-year-old Fitzgerald Tremayne Guillory while robbing a dice game at the park on March 20.

The grand jury returned true bills on three counts of first-degree murder, three counts of attempted first-degree murder and six counts of armed robbery with a firearm.

He was also indicted, along with Lon Porter, on three charges of aggravated assault with a firearm.

Authorities said Hadnot was the shooter and Porter the driver in a shooting incident earlier that day. Video of the incident showed a man authorities said was Hadnot hanging out the window of a vehicle shooting at another vehicle. The bill of indictment said Hadnot used a .40 caliber handgun to shoot at the vehicle, in which three males, including the 12-year-old boy, were riding.

Porter was also indicted on a charge of possession of a weapon by a convicted felon and accessory after the fact to first-degree murder.

The bill said Porter “harbored, concealed or aided” Hadnot after the killings.

Other indictments

• Brandon Demoine Franklin, 29, was indicted on a charge of attempted second-degree murder related to a Jan. 18 incident.

• Clarence Emory Sanderson, 75 was indicted on charges of molesting a 6-year-old boy between Jan. 1, 2012 and Oct. 31, 2012. The grand jury returned five counts of aggravated incest.

• Jason Bennette was indicted on a charge of vehicular homicide. Bennett was allegedly under the influence of a “controlled dangerous substance” when he was involved in an accident on Sept. 24, 2012 that killed a person.

The main suspect in last month’s triple homicide at McMillan Park was indicted Friday on three counts of first-degree murder and three counts of attempted first-degree murder. (Rick Hickman / American Press)

Armonta Dquon Hadnot