Roy Den Hollander was a self-described “anti-feminist” lawyer who flooded the courts with seemingly frivolous lawsuits that sought to eliminate women’s studies programs and prohibit nightclubs from holding “ladies’ nights.” Mr. Den Hollander showed up at Judge Salas’s home in North Brunswick, N.J., and fired multiple gunshots, killing the judge’s son and seriously wounding her husband, who is a criminal defense lawyer, investigators said. The judge, who was in the basement at the time, was not injured. Mr. Den Hollander’s body was found near Liberty, N.Y. — about a two-hour drive from the judge’s home — after he shot himself in an apparent suicide. The F.B.I. contacted New York State’s chief judge, Janet M. DiFiore, to notify her that Mr. Den Hollander had her name and photo in his car. The agents did not indicate whether Mr. Den Hollander had intended to target her as well. Mr. Den Hollander, 72, identified with a broader movement of men who in often abusive, misogynist and hateful language rail against “feminazis.” He had had a long history of filing lawsuits against programs that he believed favored women. Mr. Den Hollander might also be linked to the July 11 2020 killing of another men’s rights lawyer, Marc Angelucci, in San Bernardino County, California. Mr. Den Hollander graduated from the George Washington University Law School in 1985. He later received a degree from Columbia Business School, according to a LinkedIn profile under his name.