Police have been trying to work out how Mr Buczynski came to be in the water, dead, with a 4-cm wound to the back of his head.
A source who asked not to be named said that doctors who performed the Patong autopsy said that there was no water in Mr Buczynski's lungs or stomach, indicating that he did not drown.
Police are working on a number of theories; that he was swimming and was hit by a boat propeller; that he was walking on rocks and slipped, banging his head and then falling into the water; or that he was murdered by someone who then dumped his body in the sea.
In front of hundreds of sunbathing tourists, the body of Mr Buczynski was retrieved yesterday by rescue workers. It was estimated he had been dead about an hour.
Hanging around his neck was a pouch containing his passport, cash in both baht and euros and an empty pill packet that once contained Benzodiazepine, a sedative.