STATE Attorney-General Brian Wightman is not swayed by calls for an inquiry into the murder conviction of Susan Neill-Fraser.
Despite the lack of a body, Neill- Fraser was convicted of murdering her long-term partner Bob Chappell on Australia Day 2009 as they sailed the Derwent River in the Four Winds yacht.
Neill-Fraser's barrister, Robert Richter, has written to Mr Wightman requesting he open a commission of inquiry into the controversial case.
The letter says "new and fresh information" raises doubts about her guilt.
Mr Richter suggests the inquiry could be headed by former Tasmanian and Commonwealth director of public prosecutions Damian Bugg, QC.
Mr Richter believed the inquiry would prompt Mr Wightman to order the courts to quash the conviction or start a retrial.
"The advantages of an inquiry approach are that it is, and will be seen to be, independent of government, police, prosecution and defence," he said.
An inquiry was also preferable to a court process because of its investigative powers, he said.
Neill-Fraser lost an appeal to have the conviction overturned last year.
However, she was resentenced to 13 years non-parole, reduced from 18 years.
Mr Wightman said there would need to be exceptional circumstances to warrant a commission of inquiry.
"Especially when options to seek to have the matter re-examined by the courts have not been pursued," Mr Wightman said.
"It is important to note that the case has gone through a Supreme Court trial and an appeal in the Court of Criminal Appeal."
Mr Wightman said people should read the case for themselves at www.austlii.edu.au