A 63 year-old Belgian man told police in Pattaya that after befriending a Thai man in a Jomtien beer bar he took him to his room for sex.
But while Luc Rapoye was in the shower Thalang Thamnao, 29, made off with his wallet and escaped on a motorbike.
Pattaya station chief Pol Col Prawit Chorseng and chief of the tourist police at the resort Lt-Col Piyapong Ensarn were soon on the case.
They studied CCTV and talked to those in the area and discovered that the thief was hiding out at a room in Sa Liam sub-district of Phatnat Nikom district in Chonburi.
There the thief was arrested along with 100 Euros, 1,500 baht and a wallet.
Thalang – who The Pattaya News said was a gay man – has been charged with theft during the hours of darkness and receiving stolen goods.
He was detained and fingered by the victim at the police station.