A friend is looking for a TV show ( US ) which featured a husband and wife Private Eye team. The lead actors were african american and were ( posibly ) based in Washington.
The 1989 CBS show "Snoops" was a detective series set in DC, featuring a husband-wife duo in the style of the old ''Thin Man'' movies, the spin being that the couple is African-American - He's a criminologist from Georgetown University. She works as head of protocol for the State Department.