The son of a judge who presided over one of Jeffrey Epstein's court cases has died and an "anti-feminist" attorney is the prime suspect in the killing.
A gunman dressed as a FedEx delivery driver came to the home of district court judge Esther Salas, 51, on Sunday evening.
Her son Daniel Anderl, 20, was killed in the attack and her defense attorney husband Mark Anderl, 63, was critically injured.
Roy Den Hollander, the suspect in the shooting, later died of an apparent self-inflicted gunshot wound, CNN reported.
Den Hollander was an attorney who once argued a case before Judge Salas and had trashed her in a self-published book he wrote this year.
He was diagnosed with terminal cancer and had described himself as an "anti-feminist" lawyer who defends "men's rights."
The horrifying shooting is believe to have unfolded after the young man opened the door of the family's North Brunswick, New Jersey home to the gunman at 5pm.
He was immediately shot in the heart, the Daily Mail reported.
Before the gunman fled the scene he shot the older Mr Anderl several times after he came to investigate the noise.
Judge Salas was in the basement at the time of the attack and was uninjured.
Mr Anderl's condition is said to be stable as he is treated in Robert Wood Johnson Hospital in New Brunswick, the New Jersey Globe reported.
Judge Salas had recently been assigned to a civil financial fraud case tied to Jeffrey Epstein.
The ongoing case was brought by Deutcsh Bank investors who claimed that the bank made false and misleading statements about anti-money laundering policies.
They claim the bank also failed to monitor customers such as Jeffey Epstein, who they allege was high risk.
Earlier this month the bank agreed to pay a $150million (£118million) fine for having continued to work with Epstein after he was convicted of soliciting underage prostitutes in 2008.
Den Hollander, the suspect, was found dead from a self-inflicted gunshot wound in Sullivan County, New York.
He had represented a woman who wanted to register for the military's selective service and claimed the draft was unconstitutional because it barred women from registering, CNN reported.
Judge Salas ruled against some of his arguments, but allowed to lawsuit to proceed.
Den Hollander describes himself on his website as an "anti-feminist" lawyer who defends "men's rights."
North Brunswick Mayor Francis Womack told ABC News that Salas had received threats "from time to time".
He added that "everyone is saying that recently there had not been any".
"No words can express the sadness and loss we share tonight as a community after senseless shootings of the husband and son of USDC Judge Esther Salas."
