Wastes of life like those guys guys who did this are the reason I'm against fully abolishing the death penalty. There should be a whole different category of execution for worthless people like that: Death by savage and prolonged beating. Or maybe we should revive the old ways of doing things, did someone say crucifixion.
We humans are capable of the most horrible things.
"Human beings are at once the ugliest and most beautiful creatures on earth."
Not sure where I heard that but it seems like a pretty apt statement.