In March 2016, in a nondescript apartment on the outskirts of Rome, Manuel Foffo and Marco Prato, two "ordinary" young men from good families, brutally murdered twenty-three year old Luca Varani. News of the seemingly inexplicable crime sent shockwaves through Rome and beyond. What motivated such extreme violence? Were the killers evil or in the grip of societal evils? Did they know what they were doing? Or were they possessed? And if the latter,...