The besiege took place at noon. Several senior police officers and those familiar with Wanchai took turn to try to convince the lecturer of Phranakhon Rajabhat University to surrender but he still held himself hostage, pointing the gun at his head most of the time.
Wanchai allegedly shot dead Pichai Chaisongkram, 56, and Nattapon Chumworathayee, 54, on Wednesday following dispute over academic qualifications.