Sun: Says he's a firearms enthusiast What began as a traffic accident in Pattaya has rapidly escalated into a major criminal investigation after police uncovered illegal weapons and a large stockpile at a residence, along with possible links to cross-border scam networks.The case centres on Sun Mingchen, a 31-year-old Chinese national whose overturned car in Chon Buri province led police to discover illegal firearms and triggered a widening probe into his activities, finances and associates. The investigation began on the evening of May 8, when officers from Na Jomtien police station responded to reports of a sedan overturning in Chon…