The FBI has released the name of the man believed to be the gunman in a shooting at a federal judge’s home in North Brunswick Sunday evening.

Authorities say that Roy Den Hollander is the “primary subject in the attack” at Judge Ester Salas’ home. The shooting left her 20-year-old son Daniel dead. Her husband, defense lawyer Mark Anderl, was injured in the attack.

Den Hollander, a self-described “anti-feminist” lawyer, was later found dead in the Catskills of an apparent self-inflicted gunshot, according to officials. He received media attention including appearances on Fox News and Comedy Central for lawsuits challenging perceived infringements of “men’s rights.”

Authorities say that Den Hollander dressed as a Federal Express delivery person when he showed up at Salas’ home around 5 p.m. Sunday. He allegedly fired on Anderl when he opened the front door and then shot Daniel when he came down the stairs. Salas was in the basement at the time of the shooting.

A neighbor and friend of the family tells News 12 New Jersey that she heard the gunshots.

“I came out and...I almost passed out, to be honest. I almost passed out because we know them so well,” says Marion Costanza.

Den Hollander had a gender-equity lawsuit, filed in 2015, that was being heard by Salas involving a young woman who wanted to register for the military draft. He also mentioned the judge in writings posted online, deriding her as a ladder climber who traded on her Hispanic heritage to get ahead.

A package addressed to Salas was found along with Den Hollander’s body, officials said.

In a screed Den Hollander posted online, he also wrote of posing as a FedEx delivery person to speak with a young girl, the same tactic the gunman apparently used at the door to the judge’s family home.