On July 8, 2026, Nguyen Ha Duy, a mathematics teacher at Tuyen Quang Specialized High School, was officially arrested by the Tuyen Quang police for his involvement in irregularities concerning the high school graduation exam scores. This action follows a three-day period of detention for investigation into his alleged abuse of power while performing official duties.

The investigation was prompted by the alarming discovery that 147 out of 154 students who achieved perfect scores in mathematics during the 2026 graduation exams were from the same school. This represented over 95% of the total perfect scores in the province, raising significant concerns regarding the integrity of the examination process.

Nguyen Ha Duy, born in 1998, has a notable academic background, having previously led the school's national math competition team and served as the Deputy Secretary of the school's youth union. He graduated with honors from Hanoi University of Education, where he specialized in mathematics.

According to Colonel Tran Tuan Anh, head of the Tuyen Quang Police Department's Planning Division, the case is complex and requires thorough investigation to clarify the circumstances surrounding the unusually high number of perfect scores. The provincial leadership has emphasized a strict approach to handling the situation, ensuring that there will be no exceptions or cover-ups.

As the investigation unfolds, authorities are focusing on the patterns of the exam scores, particularly noting that the perfect scores clustered within a narrow range of candidate numbers, indicating potential manipulation. The police are committed to uncovering the truth behind this incident to uphold the integrity of the educational system.