What are the wrong-making features in this case? These are what seem to be the relevant details:
“According to British news reports, Mr. Bramhall, 53, admitted to using an argon beam — an electrified gas jet that liver surgeons typically employ to stanch bleeding or to mark an area of operation on an organ — to etch “SB,” his initials, onto the livers. Argon beam marks are usually not harmful and would normally disappear. But they were apparently discovered by a colleague when one of the patients underwent a follow-up operation.”
Suppose instead he had sewn a suture in a distinctive way, his “signature style.” Would that too have been “assault”?