If the person knows that there is a weapon , it is foreseeable that it might be used .
The fact that the other participants do not instruct the one carrying to leave it behind means that its use must be within the scope of their intention .
If the person knows that there is a weapon , it is foreseeable that it might be used and the fact that the other participants do not instruct the one carrying to leave it behind means that its use must be within the scope of their intention .