WASHINGTON — Dylann Roof, the man suspected of killing nine people at a historically black church in Charleston, S.C., last month is expected to face federal hate crime charges, two law enforcement officials said on Wednesday. Mr. Roof, 21, already faces nine counts of murder in state court and could face the death penalty there. But Justice Department and F.B.I. officials have said the Charleston shooting was so horrific and racially motivated that the federal government must address it. The Justice Department had also been considering the seldom-used charge of killing someone while obstructing religious freedom, which is eligible for...