Death penalty defense guru Judy Clarke on Monday asked a Boston federal judge to add another death penalty specialist to the defense team for accused Boston Marathon bomber Dzhokhar Tsarnaev, who faces 17 charges that could carry the death penalty.

Clarke, of San Diego’s Clarke & Rice, is helping federal public defender for the District of Massachusetts Miriam Conrad defend Tsarnaev, assisted by two of Conrad’s assistants, Timothy Watkins and William Fick. Clarke wants additional help from Washington and Lee University School of Law professor David Bruck, who directs the school’s death penalty defense clinic.