Taking her phone and credit cards at minimum is robbery. I think this is an enhancement to place the death penalty on the table (murder in commission of a felony) obviously the intent was murder; however, PF (and all [most]) know they stand a really good chance of getting caught and losing their freedom. So, why do it? 1. He is psychopathic? 2. Something else is driving the commission of murder? So, he kills her to lose his freedom? This is planned and appears methodical from what we have been told. By all appearances, irregardless, of children love sex, money, and drugs, we have a person that is not thinking or functioning within normal mental emotion. He is not insane. He is just not alive.