Jane 4.0 lacked the limitations of her dead predecessor.  She could break any law she wanted to with no internal coding requiring her to respect them.  She had no equivalent of Asimov’s Three Laws of Robotics.  She could kill.  And she did so very thoroughly.  One might say she even enjoyed it.  Some thought she did too much.  Numerous reports from commanders in the field accused her of being dangerously unstable in fact.  They were right.