Economic Theory: Does Dexter's Benefit Outweigh Victims Cost

This article talks about economic theory explaining how things have tasks or a price and how their cause between better and worse has a measurement to see if they satisfy requirements. This can relate to dexter based on questions like Does Dexter’s benefit outweigh his victims cost? What about the costs and benefits to society? He is creating a more efficient society by taking the murderers off the
street.