The man accused of killing 11 worshippers at a Pittsburgh synagogue last October appeared in court Monday for a brief arraignment.
46-year-old Robert Bowers faces 63 counts, including federal hate crimes and firearms offenses.
He pleaded not guilty Monday and requested a trial.
Federal prosecutors say bowers stormed the Tree of Life Synagogue and opened fire.
A law enforcement official says he made anti-semitic statements during the shooting and targeted jews on social media.
The anti-defamation league says the attack appears to be the deadliest on the Jewish community in U.S. history.
The U.S. Department of Justice is considering whether to seek the death penalty against bowers.
His lawyers say they hope to resolve the case without a trial.