Rory’s current lawyer has told the family it is highly likely this was a scam.
Until the hearing, his parents remain unsure when he will come home.
“We have no great confidence that things will be resolved now,” Helen said.
“It is just the unknown that is scary. We don’t know for certain what will happen now and that is what keeps us up at night.”
John added: “It is incredible that Rory could go to jail on a charge where the injured party says she knows it is a misunderstanding – and does not want to press charges.”
Speaking to his parents over FaceTime, Rory said: “I’ll email my lawyer tomorrow to see what is happening but hopefully I will be home soon.
“I don’t leave the hotel most days. Some days I try to go for a walk to get exercise.
“I just need to stay strong and keep putting a brave face on.”
The BBC spoke to a police officer at Chanasongkhram police station in Bangkok who confirmed that Rory was arrested between 9-10 March on the charges of theft by night for stealing a mobile phone.
When asked about the claims that it had been a misunderstanding, the officer said there was no record about it and that “the offence has been done.”
He said the case was now at the prosecutor’s level and said other details could be clarified in court.
Under the Thai criminal code, such a charge is punished with imprisonment of one to five years and fined £46 to £228, or 2,000 to 10,000 Thai baht.
A spokesperson for the Foreign Office confirmed it was supporting a UK resident arrested abroad and was in communication with the local authorities.