And his mum, Katherine Errington, is now fighting to stop the man responsible for his death having his time behind bars reduced. Galbraith had originally been expected to serve two-thirds of his sentence behind bars, but that could be reduced to half. “I’ve seen that Andrew Harper’s killers probably won’t be getting out and I understand that for killing a police officer. That also backs the campaign to keep Dana Carr, the mum of murdered County Durham toddler Maya Chappell behind bars. However, he reiterated that it was “simply not possible to prevent all offenders from being released early without the prison system collapsing”.