The lawyer who killed a federal judge’s son and seriously wounded her husband at their New Jersey home last summer also had been tracking Supreme Court Justice Sonia Sotomayor, the judge said in a television interview.

U.S. District Judge Esther Salas said FBI agents discovered the information in a locker belonging to the lawyer, Roy Den Hollander. “They found another gun, a Glock, more ammunition. But the most troubling thing they found was a manila folder with a workup on Justice Sonia Sotomayor,” Salas said in an interview with CBS News’ “60 Minutes.” The segment is scheduled for broadcast Sunday, but a portion of the interview aired Friday on “CBS This Morning.”

Both the Supreme Court and the FBI declined to comment Friday. “We do not discuss security as a matter of Court policy,” court spokeswoman Kathy Arberg said in an email.

Authorities have said Den Hollander, a men’s rights lawyer with a history of anti-feminist writings, posed as a FedEx delivery person and fatally shot 20-year-old Daniel Anderl and wounded his father, Mark Anderl, in July. Salas was in another part of the home at the time and was not injured.

Den Hollander, 72, was found dead of a self-inflicted gunshot wound the day after the ambush. Authorities believe he also shot and killed a fellow attorney in California in the days before the attack at Salas’ home.

The AP has previously reported that when Den Hollander was found dead he had a document with him with information about a dozen female judges from across the country, half of whom are Latina, including Salas.

Salas has been calling for more privacy and protections for judges, including scrubbing personal information from the internet, to deal with mounting cyberthreats. The U.S. Marshals Service, which protects about 2,700 federal judges, said there were 4,449 threats and inappropriate communications in 2019, up from 926 such incidents in 2015.

Legislation named for Salas’ son that would make it easier to shield judges’ personal information from the public failed to pass the Senate in December, but could be reintroduced this year.