David Marciano (born January 7, 1960, in Newark, New Jersey) is an American actor best known for his roles as Detective Raymond Vecchio in the television series Due South and Detective Steve Billings in the FX police drama The Shield. Marciano is currently cast as Virgil, a surveillance expert, in the Showtime television series Homeland.In 1991, Marciano married Katayoun Amini (who played Vecchio's ex-wife Angie in Due South) and together they have two daughters and one son.