NORTH BRUNSWICK, New Jersey- Judge Esther Salas, well-known in the northeast for becoming the first Latina U.S. Magistrate Judge to the District of New Jersey and for handling multiple high profile cases, is mourning the loss of her son after he was shot and killed on Sunday when an armed suspect dressed in a delivery worker's uniform gained access to her home and opened fire. 

As of 11:15 a.m., Monday ABC News is reporting that the man suspected of killing Judge Salas's son has been identified as Roy Den Hollander and that Hollander has been found dead as the result of a self-inflicted gunshot wound.

Officials say Judge Salas's 20-year-old son Daniel Anderl, was killed and her husband, Mark Anderl, who is a respected New Jersey defense attorney, was injured when Hollander approached their home dressed in a FedEx uniform.

Judge Salas was unharmed as authorities say she was in the home's basement when the deadly shots were fired. 

Initial reports from law enforcement said Daniel Anderl opened the door while his father was standing right behind him, and as soon as Anderl did this, Hollander opened fire and shot at both men multiple times. 

FBI and U.S. Marshals, who are taking the lead in the investigation, are taking a close look at Hollander's background to determine his motive.

Hollander had an online presence in the form of a website, on which he described himself as an "anti-feminist" lawyer who defended "men's rights."

Hollander had unsuccessfully filed lawsuits against bars and night clubs offering "ladies' nights," claiming they violate the 14th Amendment, and he filed suits against the federal government, challenging the constitutionality of its Violence Against Women Act and against Columbia University, for its Women's Studies program.

Federal court records show that Judge Salas has presided over several high-profiles cases, including the financial fraud case of Real Housewives of New Jersey stars Teresa and Joe Giudice.

She also handled the 2018 sentencing of Farad Roland, who was found guilty of federal racketeering charges and sentenced to 45 years in prison by Salas. Roland was the leader of the South Side Cartel, "one of Newark's most violent street gangs," a press release from the US Justice Department said.

On Thursday, Salas was assigned to handle a class action lawsuit brought against Deutsche Bank by Ali Karimi on behalf of investors who purchased securities from the bank between November 7, 2017, and July 6, 2020. The complaint alleges that the bank "failed to properly monitor customers that the Bank itself deemed to be high risk, including, among others, the convicted sex offender Jeffrey Epstein," federal court records show.