John Carnochan
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John Carnochan: 'Young men need positive role models'

John Carnochan served as a policeman for 39 years.

For the last seven of those he led the violence reduction unit in Strathclyde Police before retiring on Friday.

His work gave him a profile beyond what might be expected of a Det Ch Supt.

The reason being the violence reduction unit appeared to make headway on an age-old and difficult social problem through a radically different approach.

Mr Carnochan spoke to BBC Scotland's Andrew Kerr.