sentences:  At the end of the coup, Nhung - having shot Colonel Lê Quang Tung, the loyalist commander of the Army of the Republic of Vietnam Special Forces at a grave at Tân Sơn Nhứt Air Base the day before - executed Diệm and his brother Ngô Đình Nhu.An investigation led by General Trần Văn Đôn, another coup plotter, determined that Nhung had repeatedly stabbed and shot the Ngô brothers while escorting them back to military headquarters after having arrested them.In a 1994 interview, General Nguyen Khanh recalled, "Nhu (Diem's brother) was alive when they put the knife in to take out some of the organs...the gallbladder.