Harry Fletcher, from the National Association of Probation Officers, said the idea of mentors was "excellent" but he thought it would never happen because of the sheer numbers needed to make it work. He told the BBC:
You'd need an army of volunteers or employees of private companies to do it properly.
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Alexander Blackman will walk free from prison in two weeks. Here we take a look at the timeline of events surrounding his case.
The former royal marine could be released in as little as two weeks after his sentence was reduced from murder to manslaughter.