AUGUSTA — An Augusta couple charged in the November murder of an Augusta man pleaded not guilty Tuesday to murder charges in the Capital Judicial Center. Zina Marie Fritze, 27, and Michael Sean McQuade, 45, are charged with the murder of 31-year-old Joseph Marceau inside the couple’s Washington Street apartment. Fritze and McQuade, in separate arraignments, pleaded not guilty to the charges of murder, felony murder and robbery in what police said Monday was a “drug related” crime. Indictments against the pair, which were handed up Friday by a grand jury in Kennebec County, were sealed until Monday. Justice Daniel Billings ordered Fritze and McQuade held without bail.