Sussex Police have released a CCTV image of Jeremy Brabrooke at St Faith's Church in Havant, Hampshire.
The 56-year-old left Ford Prison in West Sussex on Wednesday November 14 and was spotted at the church later the same day.
A police spokesman said: "Officers are keen to locate and detain the 56-year-old, who was last seen at the prison on Wednesday (14 November).
"He was captured on CCTV at St Faith's Church in Havant, Hampshire, later that same day.
"He was sentenced to life imprisonment in 1988 for murder in Bradford, West Yorkshire, and is known to have links to Hayling Island and Portsmouth in Hampshire.
"Anyone who sees him or knows where he may be is asked to call 999.
"You can also contact the independent charity Crimestoppers anonymously on 0800 555 111."
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