The husband and son of a US federal judge were shot at their home by a gunman allegedly posing as a FedEx employee.
Esther Salas's husband, criminal defence attorney Mark Anderl, 63, and their 20-year-old son Daniel were gunned down on their doorstep on Sunday evening.
Mr Anderl is in a critical condition but Daniel - a freshman at Catholic University in Washington DC - has died.
Investigators are understood to have preliminary information suggesting a person dressed in the delivery company's uniform arrived at the family residence in North Brunswick, New Jersey, at around 5pm, reports ABC News.
The news outlet added that a suspect "remains at-large".
It is understood Mr Anderl was shot multiple times and his son was also shot "through the heart", local mayor Francis Womack told ABC.
Judge Salas was said to be in the property's basement during the incident and she was not injured, reports NBC New York.
The first Hispanic woman to serve on the bench of the US District Court for New Jersey, she has held her position for nine years, having previously been a magistrate and federal public defender.
The FBI Network tweeted on Sunday: "The FBI is investigating a shooting that occurred at the home of Judge Ester Salas in North Brunswick Township, New Jersey earlier this evening, July 19."
Senator Bob Menendez - who recommended Ms Salas to President Barack Obama for nomination the bench - said he knew the couple well and hoped "those responsible for this horrendous act are swiftly apprehended".
While Governor Phil Murphy described the incident as "our latest reminder that gun violence remains a crisis in our country".
Mr Womack added: "As a judge, she had threats from time to time, but everyone is saying that recently there had not been any."
