I think it's been said below, but do the courts not see the ludicrous slippery slope that this idiocy would set precedent for!? A toxic childhood environment may rationalize some causality to one's horrible actions, but it does not excuse them. We do tend to send serial killers and other high profile murderers to psychiatric wards instead of prison (to much heated debate) but we sure as hell don't apologize to and pay them settlements upon their release because "they were made to do this".... 

It's one thing to show leniency to children for crimes that can be attributed to neglect depending on age, circumstance and severity; but when there's no ambiguity as to the malicious intent, a 15 year old is more than capable of knowing right from wrong. The imprisonment and torture of enemy combatants in Guantanamo is a separate debate with many similarities to that of the death penalty. A rightfully convicted murderer may be subject to reduced time, but not monetary reparations.