Noi told police that she is given methamphetamine, or yaba, in return for her services.
Police charged the woman with human trafficking.
Mr Amornthep, denied all accusations, but police later discovered that the man had five outstanding arrest warrants in Uttaradit province for rape, defamation, and fraud. A urine test also revealed that the suspect had a drug in his system at the time of arrest.
Police will charge Mr Amornthep with human trafficking in addition to his previous charges.