"Malice aforethought" refers to a legal term that describes a deliberate intention or plan to cause harm to someone else. It means that a person acted with intention, premeditation, and evil motive to commit a harmful act. Full definition
I've seen situations where the client uses such tactics and statements to milk the law firm really big time and you know what, such clients go from one law firm to another to another, and sometimes with malice aforethought!? (2civility.org)
Voluntary Manslaughter — the intentional killing of another person without malice aforethought. (groselawfirm.com)