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A Jefferson Parish grand jury handed up an indictment Thursday in the Kenner murder of an 18-year-old whose father, struggling with grief, killed a younger son before taking his own life, according to authorities.?

Jarrone Crimmins, 19, of Kenner, was charged with second-degree murder, accused of shooting Melvin McClinton Jr., Jefferson Parish court records said.

Jarrone Crimmins

Jarrone Crimmins, 19, was arrested and booked with first-degree murder in connection with the death of Melvin McClinton.

Crimmins pleaded not guilty Friday in Jefferson Parish Magistrate Court.?

Three weeks after McClinton was killed, Kenner police say his father, Melvin McClinton Sr., 39, fatally shot his 3-year-old son, Carmelo McClinton, during an argument before turning the gun on himself. The elder McClinton died two days later.?

Investigators said Melvin McClinton Sr. had been wracked emotionally and mentally by his son's homicide.?

"This was a tragedy," Kenner Police Chief Keith Conley said after the 3-year-old's death.?

Melvin McClinton Jr. died Feb. 5, shot while sitting in the backseat of a car, according to Kenner police. Investigators suspect he was with two other people who went to the 1600 block of 42nd street in Kenner just before 1 p.m. for a drug deal, authorities said.?

Video recorded by a surveillance camera shows a person approach their vehicle, stop and then shoot at the car, according to Kenner police. Detectives later identified Crimmins as the gunman.?

Melvin McClinton Jr., who was sitting in the backseat, was shot multiple times. Two unidentified men took him to the emergency room at Ochsner Medical Center in Kenner, but he died of his injuries, police said.?

Crimmins was arrested Feb. 7 and booked with second-degree murder.?

McClinton - Melvin

Undated photos of 3-year-old Carmelo McClinton, left, and his father, Melvin McClinton Sr., 39. Melvin McClinton is accused of fatally shooting his young son before trying to take his own life at their Kenner home on Wednesday, Feb. 28, 2024.

Carmelo was shot at his Susan Park neighborhood home in Kenner on Feb. 28. Witnesses told police that Melvin McClinton Sr. had been behaving erratically since the 18-year-old's funeral four days earlier, according to authorities.?

He began arguing with Carmelo's mother when she stopped by the residence to pick up the toddler. Things turned physical, and police say Melvin McClinton Sr. shot the 3-year-old, then went outside and shot himself in the head while standing in the driveway.?

Thalmus Williams, Melvin McClinton Sr.'s brother, told WWL Louisiana that?he was crying out for help.?

“The things he went through as far as losing his son and trying to hold it together, it was too much to bear," Williams said.

After Crimmins' indictment, the court raised his bail to $750,000. He was being held Monday at the Jefferson Parish Correctional Center in Gretna.?

Email Michelle Hunter at mhunter@theadvocate.com.