What is the test for aiding and abetting a crime?

he was aiding and abetting committed that offense with the requisite specific intent to kill and such was a reasonably foreseeable consequence of the target crime he intended to aid and abet, i.e., the Five Star robbery. (See People v. Prettyman (1996) 14 Cal.4th 248, 260.) In other words, "[a] person who knowingly aids and abets criminal conduct is guilty of not only the intended crime but also of any other crime the perpetrator actually commits that is a natural and probable consequence of the intended crime." (People v. Mendoza (1998) 18 Cal.4th 1114, 1133.)