A man has been arrested in the killing of Syed Hammad Hussain, a 40-year-old Northwest Washington resident found dead inside his condominium in the city’s ritzy Logan Circle neighborhood in February, in what police describe as a “particularly heinous” case involving a robbery, a violent assault and a fire set after his death.
Rico Rashaad Barnes, 36, of Northwest D.C., was arrested Monday and charged with first-degree murder while armed in Hussain’s killing, authorities said. Police have identified a second suspect, who is already in custody on unrelated charges and is expected to be charged in the case…