(CNN) The suspect in last month's shooting at a synagogue in Poway, California, now faces more than a hundred federal civil rights and hate crime charges, according to federal prosecutors.

On Thursday, US Attorney for the Southern District of California Robert Brewer said prosecutors filed a new criminal complaint against 19-year-old John T. Earnest.

Earnest is accused of carrying out the deadly shooting at the Chabad of Poway synagogue that killed 60-year-old Lori Gilbert Kaye and injured three others, including the rabbi and and 8-year-old girl. He is also suspected of arson at a mosque in nearby Escondido in late March.

"Our actions today are inspired by our desire to achieve justice for all of the victims and their families," Brewer said at a news conference.

The new criminal complaint charges Earnest with 109 new counts -- including 54 counts of obstruction of free exercise of religious beliefs resulting in death and bodily injury and involving the attempt to kill, Brewer said.

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