He also said the police offered to drop all charges for 50,000 baht. The young man took his allegations today to the Damrongtam complaints office in Phuket City.
His face and his wrists bore wounds and scars that supported his claim of beatings.
Chalermporn Kaewmanee, 20, said he was waiting outside his aunt's house, near Surakul Stadium, in Phuket City on Friday, having returned from his job at a motorcycle rent shop in Surin.
He did not have a key and was waiting for his aunt to return home when a police patrol pulled up about 9pm.
Police did not accept his explanation for waiting in the street, he told Phuketwan tonight. ''They beat me in the street,'' he said.
''Neighbors heard and saw what was happening. Then they broke into my aunt's house.''
He said police searched the house and found no drugs, but they did find a drugs pipe that he admitted belonged to him.
A police pickup was called and he was loaded into the back, handcuffed.
''On the way to Phuket City station, the polceman beat me,'' Khun Chalermporn said. ''The policeman told me, 'If you don't have any drugs, I will have some for you.'''
On arrival at Phuket City police station, Khun Chalermporn said he was beaten by a policeman with a baton. Later on the third floor, five or six policemen beat him.
He was taken to Vachira Phuket Hospital, not far from the station, where he had nine stitches in a cut to his forehead.
On the way back to Phuket City station, Khun Chalermporn said he was told he would have to accept the drugs charge that 0.97 grams of ya ice methamphetamine had been found on him, or face a worse beating.
His aunt was told that the charges could be dropped if payment of 50,000 baht was made. He signed a confession and was granted bailed the following day for 350,000 baht.
Today at the Damrungtam office in Phuket City with his father Kaset, Khun Chalermporn said he remembered the faces of the two policemen who were the officers who assaulted him the most.
He is due to appear in court again on November 24. Meanwhile, the Damrungtam office will pass on the allegations to Phuket Governor Tri Augkaradacha.