A Flowery Branch man accused of shooting his brother on Christmas Day has pleaded not guilty to charges of murder and felony obstruction of an officer, according to court records. Mark Alan Fyfe, 53, was indicted on Aug. 26 in the death of his brother Alan Scott Fyfe, 55, last Dec. 25. Mark Fyfe was charged with murder, felony murder, aggravated assault, interference with government property and three counts of felony obstruction of an officer.