Bob is walking down the street when he slips on a banana peel. He bumps his head on the pavement and starts convulsing. Given the seriousness of his concussion, it seems that he's about to die.
Bob's ex girlfriend Alice happens to be walking nearby. She comes to his aid and gives him water. However, she secretly spikes the water with arsenic. Bob drinks the poisoned water and dies.
Is Alice guilty for Bob's death?
Edit: A similar question was asked here. My question is a bit different since I'm asking whether it is legal to harm, and not kill, a person who is dying.