Police yesterday escorted Zheng Yang, 30, from the temporary military prison at the 11th Military Circle to Pattaya in Chonburi province to point out the outlets which provided BB guns and rental motorcycles used in the heist.
Metropolitan Police Bureau acting commissioner Sanit Mahathaworn said the shops will be checked against the account which Mr Zheng gave during questioning.
Mr Zheng was caught on Saturday (Mar 5) at Nakhon Sawan railway station on a train heading from Bangkok to Chiang Mai.
At least five men carrying BB guns and knives attempted to rob the Interarms gunshop in the Wang Burapha area on Charoen Krung Road in Phra Nakhon district last Friday.
As the robbers tried to flee, a police officer fired at them after they pointed their BB guns at him. The officer’s shots killed Wu Xingjun, 40, and injured Sun Junwei, 27, Li Kunpeng, 26, and Ma Geng, 34. Pol Lt Gen Sanit said the motive for the robbery could be gun trafficking. However, the probe will also be widened to find other possibilities. He said police were also waiting for information from Chinese authorities to check whether the suspects had criminal records in their home country.
Meanwhile, Mr Sun, who has been discharged from Police General Hospital, was also taken to the gun shop to re-enact the crime yesterday.
Police also asked the court to move the three other suspects to the temporary military prison to help the investigation.
Officers also revoked the visa of Su Su, 29, a Chinese man arrested in Phuket on Saturday, after investigators found he supplied a telephone SIM card to one of the suspects. It was one of many cards found in his possession.
Mr Su denied being involved in the robbery but his possession of so many SIM cards raised suspicions. He was later found to have supplied the cards to tour companies which distributed them to Chinese tourists.
Officials are in the process of deporting him back to China. He was also banned from entering Thailand for five years.
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