I might want to have a say in this.
The topic is, surely interesting. I will have a couple of questions. Firstly, if the person in question can be this easily convinced to kill himself, taking such an important decision by the push (not coercion) of an external stimuli, does his life belong to himself in the first place? If you can't take responsibility for your suicide, if you are convinced to do it, how much is the value that you give to your life anyway? Second, or rather third, in this occasion, if you do lack an internal drive to suicide and/or value your life enough not to commit it, you can not be persuaded to kill yourself. Self destruction is very much like a flower, in order for it to grow, there must be a seed in the first place. I am not saying that the gardener did not water the seed by her own responsibility, I am just stating out the possibility that the same seed would still grow by the personal hails and thunders of an individuals life.
It's a pity to see that if the person had proper guidance & counselling, this might have never happened.
Words do have power, yes. Words do have power over everyone. Yet, except extreme cases, which I concur this is not, there is no external manipulation of objects, driving someone to suicide or huge amounts of gaslighting as far as I can see, you are the one who gets to decide that which words should have power over you or not. Ms. Carter could have saved the person who commited suicide, she did not. The judge says that “He breaks that chain of self-causation by exiting the vehicle, he takes himself out of that toxic environment that it has become.†For a moment, yes, he is right. He is, definitely right. Yet, how much this decision can be reliable if he returned back in the car with a single command to kill himself? In this, the situation wraps itself into a pickle, if his self worth is defined at the moment by what she said in that moment, he could have thought that "Even my friend wants me to die", yet still, considering his psychological distress, why should he fulfill the wish of a friend who wants him dead, for the gratification earned by it would cause him to perish? If the will to be alive was more profound in the person who commited suicide, Mr. Roy would be, I think, able to give a "No."
Is Ms. Carter criminally responsible for doing that? I suppose not.
Is she philosophically responsible? In that, I don't have a say. That's really much up to her own self.