Bruck was stand-by counsel for Dylann Roof, the killer of nine people in the Charleston church shooting, who represented himself in federal court. Roof was convicted by jury on all 33 counts on December 15, 2016. On January 10th 2017, after three hours of jury deliberation Dylann Roof was sentenced to death. In 2020, Bruck was chosen to represent one of the plotters of the September 11 attacks, Ramzi bin al-Shibh.