Can a person be found liable for aiding and abetting a crime?

alone, by the terms of CALCRIM No. 401, that would be insufficient to establish aiding and abetting liability. This point is even emphasized by the portion of the instruction that reads as follows: 'Someone aids and abets a crime if he or she knows of the perpetrator's unlawful purpose and he or she specifically intends to, and does in fact, aid, facilitate, promote, encourage, or instigate the perpetrator's commission of that crime.' (CALCRIM No. 401.)" (People v. Stallworth (2008) 164 Cal.App.4th 1079, 1103-1104, italics in original.)