A nurse who went missing after taking part in a medical trial for a treatment for malaria is being investigated by police over allegations of a sex attack.
Matthew Lloyd, from Southampton, Hampshire, turned up safe and well in the Netherlands on Tuesday after an extensive international search.
Sources confirmed Mr Lloyd, 35, is on bail after being arrested in connection with allegations that a 20-year-old woman was indecently assaulted twice on a Southampton street.
He has not been charged with any offence and was free to leave the country.
Hampshire Police said in a statement: "We will not confirm or deny whether this individual has previously had police contact, and it is not Hampshire Constabulary's policy to confirm the identity of anyone arrested in connection with an offence."
Mr Lloyd was reported missing when he failed to attend an appointment on October 7 in Oxford, where he was due to receive drugs in connection with the trial. Police said he could die if he did not receive urgent medication.
The nurse, who works at Southampton General Hospital, had phoned in ill to work in the days immediately before his appointment.
He was spotted on CCTV in Kings Cross, London, and police suspected he had travelled abroad after they discovered he had his passport and £900 in cash in his possession.
He is now being assessed in a Dutch hospital.