It's emerged that the man suspected of murdering a 'Good Samaritan' in a quiet Hertfordshire village was a convicted killer on day release from prison.
Graham Buck from Little Gaddesden was stabbed to death as he apparently tried to help a neighbour who was being attacked.
So far there has been no trace found of the main suspect Ian McLoughlin who police say is extremely dangerous.
Watch Elodie Harper's report...
Police are seeking to question 55-year-old Ian John McLoughlin, also known as Ian John Baker, in connection with a murder in Hertforshire.
Detectives have released CCTV images of a man wanted in connection with the murder of a pensioner in Hertfordshire.
Police are continuing their search for Ian John McLoughlin after a man, was found murdered in Little Gaddesden yesterday