Supporters of the convicted Lady in the Lake murderer Gordon Park are attending a National Miscarriages of Justice Day public meeting in Liverpool.
Gordon Park was convicted in January 2005 of killing wife Carol
Gordon Park, 62, still denies killing his first wife Carol in July 1976, and dumping her body in Coniston Water in the Lake District in Cumbria.
He was jailed for life in January 2005 at Manchester Crown Court.
Carol Park's brother, Ivor Price, said he was "distressed" by the ongoing campaign by Gordon Park's supporters.
Mrs Park was dubbed the Lady in the Lake by detectives after the Raymond Chandler crime novel of the same name.
A jury at Manchester Crown Court heard Park, a retired teacher from Barrow, bludgeoned his wife to death with an axe, then dumped her body in Coniston Water where it lay undiscovered for 21 years.
The jury dismissed his not guilty plea after a 10-week trial.
The meeting, organised by United Against Injustice (UAI) was being held at Blackburne House on Saturday.