The poor schmuck claimed that he was a reluctant mule for a loan shark whom his brother owed $10 grand or so. If Australia had any sense of justice it would have offered to exchange the loan shark/drug dealer for this poor guy.
They did want to do a prisoner swap ... but Singapore turned it down.
His brother owed $ for drug offences. Stupid.
http://www.abc.net.au/am/content/2004/s1070780.htm