Minh Mạng
On another hand, Duyệt was the mandarin who charged former Crown Prince Cảnh's wife for having an incestuous relationship with her eldest son and then executed her by drowning in 1824. Duyệt's action effectively ended the claim to Vietnam's throne by Prince Cảnh's descendants. According to one report however, Minh Mạng had already been informed from another quarter of the affair. Choi Byung Wook, a Korean historian, described this event as a "most dramatic event illustrating Lê Văn Duyệt's loyalty to Minh Mạng".