Why can’t we just kill these two?

When I read something like this I seriously question why we don’t just kill the vermin.  

There is no hope here, no light to their eyes. They’ll commit similar crimes again.  In fact,   

Police said Rodriguez was already on parole for 2nd-degree assault before the incident.  

For those who think death too harsh a sentence, they could have easily killed the victim.

I was going to post some info on recidivism, but decided fuck it.  I don’t want to share the world with vermin like this.  Kill them. For the greater good.  Nothing else need be said.