The Herndon man accused of shooting a security guard at the downtown Washington headquarters of the Family Research Council is due back in court Monday.

Floyd Lee Corkins II, 28, is scheduled for a hearing in federal court at 9:30 a.m.

Corkins allegedly shot Leonardo R. Johnson, 46, at the conservative Christian lobbying group’s Chinatown office on Aug. 15.

Corkins pleaded not guilty on Aug. 24 to the federal charge of transporting a firearm and ammunition across state lines, and to D.C. charges of assault with intent to kill while armed and possession of a firearm during a violent crime.

The shooting happened in the lobby of the G Street NW building following a scuffle between the men, officials said. Corkins allegedly expressed disagreement with the conservative lobbying group’s politics.