Supporters of Lady in the Lake killer Gordon Park have held a vigil outside the prison where he is serving a life sentence for murdering his wife.
Gordon Park was convicted in January 2005 of killing wife Carol
About 40 of 62-year-old Park's family and friends gathered at Strangeways prison in Manchester to mark the first anniversary of his conviction.
Park was jailed for killing his first wife Carol and dumping her body in Coniston Water in the Lakes in 1976.
His current wife Jenny, who led the vigil, is convinced he is innocent.
She hopes the vigil will help her win freedom for her husband.
"We are trying to bring public attention to the fact that there is an innocent man in prison and the more people we reach the better," she said.
"Somebody might watch this campaign who knows something, they might ring and it might be a new lead which would be very useful indeed.
"Not for one second have I believed he was guilty. I have been married to Gordon for 15 years and known him since I was 14 and he has never changed in all that time."
Supporters at the vigil wore T-shirts and carried banners saying "Free Gordon Park". A one-minute silence was also held before prayers were said.
Retired teacher Mr Park, who is from Barrow in Cumbria, was found guilty of the murder in January 2005 but has always maintained his innocence.
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 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.