At about 9:50 a.m. Oct. 27 a man armed with handguns and an assault-style rifle walked into the Tree of Life Jewish synagogue in Pittsburgh and opened fire, according to a criminal complaint filed by the U.S. Department of Justice.

The criminal complaint, filed with the U.S. District Court for the Western District of Pennsylvania on Monday morning, said Robert Bowers made his way to the third floor of the synagogue in the Squirrel Hill neighborhood, wounding several people before eventually exchanging gunfire with law enforcement officers. Along with injuring four law enforcement officers and others, 11 worshipers were ultimately killed in the shooting, court papers said.