If it as you and Miles say and Negri has acted on Ezar's orders, then it is unlikely he will take any blame for it. Nor should he, in my opinion -

[ She firmly believes in not blaming the soldiers for the orders of their commanders like this. In this case, if Ezar did want to support them, he could have found other means than killing an outspoken dissenter in such a way. ]

- then I will take the blame.