For offences under the Criminal Code (Qld) that do not require specific intent on the part of the principal offender (such as unlawfully doing grievous bodily harm under s 320(1)), an aider under s 7(1)(b) or s 7(1)(c) need only know that the conduct constituting the offence is occurring or will occur; the prosecution need not prove the aider believed or expected the assault would be of a certain severity or have any particular result. R v Da Costa [2005] QCA 385 should not be followed to the extent it suggested otherwise.
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