MIDDLESEX COUNTY, NJ – A gunman apparently posing as a delivery man gained entrance to U.S. District Judge Esther Salas’ North Brunswick home and shot her husband and their son on Sunday night.

The shooting, confirmed to TAPinto New Brunswick by a spokesperson in the FBI’s Newark Office, left their son, Daniel, 20, dead.

Salas’ husband, Mark Anderl, a criminal defense attorney, was rushed to Robert Wood Johnson University Hospital in New Brunswick. He was reportedly in stable condition after surgery.

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Salas was not injured in the shooting, authorities said.

According to the statement from the FBI, law enforcement authorities are looking for one subject who apparently posed as a FedEx delivery man.

“Anyone who thinks they may have relevant information please call FBI Newark at 973-792-3001,” according to the statement. “We are working closely with our state and local partners and will provide additional updates when available.”

In an interview with North Brunswick Mayor Francis “Mac” Womack, ABC News is reporting that Daniel, a freshman at Catholic University, was shot in the chest.

Womack, who told ABC that he is personal friends with Salas, said that she has “had threats from time to time, but everyone is saying that recently there had not been any."

Womack did not return a phone message left by TAPinto New Brunswick.

Salas, 51, who is based in Newark, graduated from Rutgers with a Bachelor of Arts in 1991 before earning a law degree at Rutgers-Newark.

She was nominated by President Barack Obama as a U.S. District Court judge in 2010. She was confirmed by the Senate the following year.

“Judge Salas and her family are in our thoughts at this time as they cope with this senseless act," Gov. Phil Murphy said in a statement. "This tragedy is our latest reminder that gun violence remains a crisis in our country and that our work to make every community safer isn’t done.”