They won't 'get what they deserve' in prison, they will be in segregation with the nonces who will no doubt revel in stories like this.... the mother will get the worst but as already stated we (taxpayers) will now be paying for this scum to be looked after.
As for somewhere other than prison or the death penalty there is zero chance of either in these times, in fact if either of these monsters do get anything done to them in prison they will be entitled to compensation, now that really is sick