An autopsy revealed Mr Round had been beaten about the head, causing multiple skull fractures, and died in the evening of the day before he was found.
Mr Round spent much of his career as a news agency journalist for the New Zealand Press Association (NZPA) and Reuters.
He was one of the last New Zealand journalists to leave Saigon as the Vietnam War came to an end and later became Asia correspondent for NZPA in the 1970s.