Released by Riverhill Soft in 1989, D.C. Connection is the fourth adventure game in the J.B. Harold series. The title says 3 because Kiss of Murder is a side story and expansion to Manhattan Requiem, so this is the third original title. This incident involves the shooting death of Walter Edwards, who was the police chief of Liberty Town, where J.B. Harold works. The setting is Washington D.C., where J.B. Harold also lost his girlfriend. New elements such as tailing and requests for character investigations have been added.

Released by Riverhill Soft in 1989, D.C. Connection is the fourth adventure game in the J.B. Harold series. The title says 3 because Kiss of Murder is a side story and expansion to Manhattan Requiem, so this is the third original title. This incident involves the shooting death of Walter Edwards, who was the police chief of Liberty Town, where J.B. Harold works. The setting is Washington D.C., where J.B. Harold also lost his girlfriend. New elements such as tailing and requests for character investigations have been added.