The point of being against the death penalty is to accept that we aren't going to use it on people who have committed the very worst crimes imaginable. It doesn't make sense to say we need to ban capital punishment and then renege once someone does something we find really horrible.
So yes.
Even the horrific gang-rape-turned-murder in India doesn't faze you?
That case is not a good argument for the death penalty. (Unless one is going to argue that gang rape in general should be subject to the death penalty.) There was no intent to kill, just a depraved indifference to the possible effects of their actions.