Yeah, honestly, like a lot of cases like Holmes, for me the worst part is not the fraud, it's the complete willingness to completely ruin anyone that gets in her way that makes her so diabolical. The book Bad Blood makes it pretty clear how she pretty much threatened to destroy anyone that did the simple act of telling the truth. Her subsequent disregard for patients, Sonny as you put it, and heck her 2 kids in my opinion show how much she just does not care about other people.