A Baton Rouge felon already facing federal firearms charges now is accused by a federal grand jury of witness tampering and firing a gun near the victim’s residence and at her car, U.S. Attorney Walt Green said Monday.

Quentrell D. Fountain, who was indicted in December on two counts of possession of a firearm by a convicted felon, was charged last week in a superseding indictment with two counts each of tampering with a witness and victim, retaliating against a witness and victim, and discharging a firearm during the commission of a crime of violence.

The victim is a resident of Port Allen who dated Fountain, the superseding indictment states.

Fountain, 27, also is charged in the indictment with one count of possession of a firearm by a convicted felon.

The woman called 911 on Jan. 8, 2014, and told a dispatcher that Fountain had punched her in the head, pointed a gun at her and said, “if I wanted to kill you, I could kill you,” according to the indictment.

Baton Rouge police responded to the scene and launched an investigation into the incident.

Three days later, Fountain called the woman and warned, “I am going to show you for calling the police,” the indictment says. Fountain went to her residence and fired multiple shots in its vicinity while the victim and her child were inside, the indictment adds.

Port Allen police responded to the scene and began an investigation.

Fountain then fired a gun March 2, 2014, at a vehicle carrying the woman and two other passengers, the indictment alleges.

Fountain was arrested June 17 by members of the U.S. Marshal’s fugitive task force at a Baton Rouge apartment after dropping his gun and fleeing into the attic.

“Those seeking to undermine the integrity of the criminal justice system by tampering with victims and witnesses will face severe consequences in federal court, particularly when a firearm is involved,” Green said.

Assistant Federal Public Defender Carol Banna Whitehurst, who is Fountain’s lead attorney, declined comment.

The Bureau of Alcohol, Tobacco, Firearms and Explosives is taking part in the investigation.