Police officials have identified the gunman who opened fire in a U.S. synagogue, killing one woman and wounding three others.

The suspect, nineteen-year-old John Earnest, initially fled the synagogue which was crowded with Sabbath worshipers.

He was later arrested when he surrendered to police after what is believed to be a hate crime on the last day of Passover.

Investigators are examining a “manifesto” he apparently left behind on social media along with other digital evidence.

They are also probing his possible involvement in an unsolved arson at a nearby mosque about a month ago.