The suspect was found to have transferred more than B2 billion to bank accounts in Myanmar.
Mr Wichai said the dismantling of the drug network followed the arrest of two suspects and seizure of 1.5 tonnes of crystal methamphetamine, or ice, on Oct 18, 2019 at a checkpoint in Tak province.
With information they provided, arrest warrants were obtained for nine other suspects. Seven were soon caught, The two others fled to Myanmar.
On Oct 22 this year, one of the two fugitives, Kerdchana Mina, was arrested while sneaking into Thailand through Sangkhlaburi district in Kanchanaburi.
Officials learned from Mr Kerdchana that the seized crystal meth belonged to Thapanan Thamratthada, alias Nu Chen, who had a Thai woman named Lin Chal, 34, as an assistant. Ms Lin allegedly looked after the money side of the drug network’s business
Court arrest warrants were obtained for Mr Thapanan and Ms Lin.
Mr Wichai said that Provincial Police Region 6 investigators found that Ms Lin had opened bank accounts in the names of two companies - one in Mae Sot, Tak, and the other in Min Buri, Bangkok.
A warehouse in Min Buri was rented in the name of Sunday World Trading Company to store processed wood and was used as a front for laundering drug money.
Ms Lin was arrested at her house in Lat Phrao area of Bangkok yesterday, Mr Wichai said.
Authorities also seized assetts worth about B186.7mn. They included B30mn in bank deposits, two land title deeds, two cars and foreign currencies worth US$3.2mn (about B97mn).
Ms Lin was found to have transferred B2,197.4mn to banks in Myanmar. The ONCB had informed drug suppression police in Myanmar about this for further action.
Mr Thapanan, the prime suspect in this case, and another suspect, Yong Wongsawangkul, were still at large, Mr Wichai said.
Mr Wichai and Pol Gen Suchart Thirasawat, a deputy national police chief, led drug suppression officials to search the timber warehouse in Min Buri today. The value of processed wood stored there was still being assessed, Mr Wichai said.