Sometimes in certain situations, you lose all hope for whatever it is you were hoping for. In some cases, sometimes you look at certain individuals and you think that they have no hope. In the case of criminals, almost everyone is seen with hope. Hope that they rehabilitate, as that is the reason they are locked up in the first place, other than for punishment.
With children, they have the highest chance of turning their life around compared to adults, but there are just some children with behavior so atrocious that you really have no hope for their futures. The worst criminals were once children too, and enjoying the suffering of another living being is never a good sign.