Family members say Abdulloh Thaodaeng, 45, was wealthy, owning three houses, and had a large number of life insurance policies. He was also the brother of the deputy mayor of Rawai.
Drowning is discounted by some members of the family, who want police to investigate the death thoroughly. Khun Abdulloh's wife appeared less than distraught at news that her husband was missing, heightening the concerns of other members of the family.
Police were continuing to question members of the family today.
Khun Abdulloh had a house at Ao Yon, a beach between Cape Panwa and Chalong, about four kilometers from where his body was found.
He had been missing since 8pm on Saturday. Relatives asked his wife, Mem, yesterday where her husband was. She said she did not know and added: ''Maybe he's drowned already.''
Doctors at Vachira Hospital suggested sending the body to Surat Thani for a full forensic autopsy but the family opted to prepare Khun Abdulloh instead for Muslim funeral rites as soon as possible.
Brother and Deputy Rawai Mayor Jirapong Thaodaeng said the couple had been married for five years, but his sister-in-law had never previously spent a night at the Ao Yon house until Saturday night.
Most of the other members of the family lived nearby. ''If my brother had drowned, his body would have been washed further away from Ao Yon by the prevailing current,'' he said.
''His skin did not have the appearance of someone who had drowned or even been in the water.
''There was only one mark on his body, on his head. If he had been in the water, the body would have been scraped.
''I do not want to make assumptions, but his wife's uncaring attitude has caused us to be alarmed.''
Khun Abdulloh was due to be buried at the local Muslim cemetery this afternoon.