California, United States of America
The following excerpt is from People v. Nunez-Sharp, B264843 (Cal. App. 2017):
For those who aid and abet in the commission of first degree murder, the statute "imposes both a special actus reus requirement, major participation in the crime, and a specific mens rea requirement, reckless indifference to human life." (People v. Banks (2015) 61 Cal.4th 788, 797-798 (Banks).) Those requirements are found in subdivision (d) of section 190.2.
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