Does overt assistance constitute the crime of being an accessory?

9 This emphasis on identifying "overt assistance" as the substance of the crime of being an accessory is not inconsistent with the discussion in People v. Gunn (1987) 197 Cal.App.3d 408, at pages 415-416, 242 Cal.Rptr. 834, to the effect that one can be liable as an accessory to a felony based on a continuous course of conduct as opposed to a single, identifiable and agreed-upon act. All we are saying is that the activities of the accused, whether a single act or an entire course of conduct, must amount to overt assistance as opposed to mere incitement or encouragement.