Roy Den Hollander, who was found dead after allegedly killing Justice Esther Salas' son and wounding her husband, is also suspected of shooting and killing lawyer Marc Angelucci earlier this month.

Roy Den Hollander was behind several unsuccessful lawsuits against bars that promoted "ladies' night" events and universities offering women's studies courses.

The perpetrator, believed to be a lone gunman posing as a FedEx delivery person, was not in custody, the official said.