How can gun ownership among Thais be reduced?

In the case of a maniac shooting a police officer, killing 1 and injuring 1 while trying to stop the incident, many parties have expressed concern about gun ownership among Thais. What can be done to reduce it? Listen to the analytical perspective from Asst. Prof. Dr. Thanandrasak Bowonnanthakul, former chairman of the Criminology and Justice Administration Program at Mahidol University . Source: Thai News Agency