A North Sea Camp absconder has been missing for almost two weeks.
Peter Sullivan, 54, was convicted previously of manslaughter over 30 years ago, but has been recalled to prison for further offences such as burglary.
Lincolnshire Police have said that he is not currently thought to pose a risk to the public.
He is described as 5ft 11ins in height, of slim build, with a grey beard and receding hair.
Sullivan spent time in America and talks with a slight accent which has been described as sounding Australian.
He is missing the top of his third finger on his left hand and has an interest in computer science and further educating himself.
A police spokesperson said that officers believe he may be in Lincoln.
They said: “Sullivan is generally well spoken and may portray himself to be an educated man and can be manipulative and convincing.
“The CCTV image of Sullivan has been uncovered from Lincoln centre on the day he absconded.
“Please call 101 with incident reference number 323 of November 29 if you have any information.”