Criminal Affairs Specialist Yang Hyung-suk has accumulated extensive experience in investigating various criminal, security, and violent crime cases, having served as an investigator in the Criminal Investigation Section and Traffic Accident Investigation Team of the Gangnam Police Station, an investigator in the Security Investigation Division of the Seoul Metropolitan Police Agency, and a team leader in the Violent Crimes Section of the Criminal Investigation Division at the Suseo Police Station. Furthermore, having served as the Head of the Information Security Division at the Chungju Police Station, the Head of the Ogeum Police Substation at the Songpa Police Station, and the Head of the Public Order Section at the Songpa Police Station, he has acquired broad practical capabilities in frontline investigations and overall public security administration. Currently serving as a Criminal Affairs Specialist at Sanwoo Law Firm (LLC), he provides practical and strategic assistance regarding key procedures and issues in criminal cases—including police investigations, economic crimes, sexual violence, narcotics, emergency arrests, and search and seizure—based on his rich investigative experience.