If evil is behavioral, then it is a product of our environment, no?
I'm struggling with your proposed symptoms because it would seem that almost any animal, mineral, or vegetable could meet the criteria. If a truly moral person in every sense of the word existed but lacked the consciousness to be a vegan or accidentally swiped a pen from work once, they would still be "evil".
Does intent or mitigating circumstances play into this at all? If a woman killed a man that was threatening her children, would she be evil?