Therdsak Onsing, 40, who worked at the Wat Sing Post Office, was found dead in a storage building near his house in Tambon Makham Thao, Wat Sing district, at 8.30am.
Therdsak’s father, Boonsong Onsing, found him sitting in a chair with a gunshot wound to the right temple and a homemade .38 revolver nearby.
He was wearing the jersey of the Spanish national football team.
Therdsak’s father-in-law, Wan Iamchai, said the younger man had told him several times about owing Bt800,000 in gambling debts and having no way to repay them.
Wan said Therdsak visited him a few days ago and spoke as though he were saying goodbye. He’d actually urged him to not consider suicide, saying he had to remain alive for his wife’s sake.