I understand the frustration that drives your sentiment here, but if we think about it, I bet we all hope he gets what he deserves (in this life) from a duly constituted judge and jury.
If justice doesn't prevail in the courts, I believe that this sorry shipwreck of a human being still has a date with The Judge coming. No technicality will save him there.
Still, the brutality of this crime is shocking. In a world full of bestial monstrosities, this one stands out, doesn't it?
d.o.l.
Criminal Number 18F