Presence at the scene of a crime is not an essential element to the crime of aiding and abetting. State v. Smith, 32 N.J. 501, 521 (1960), cert. den. 364 U.S. 936, 81 S. Ct. 383, 5 L. Ed. 2d 367 (1961). Clearly, one who would previously have been characterized as an accessory before the fact, one who planned the criminal event, or supplied necessary equipment or otherwise procured its commission, need not be present in order to be held as an aider and abettor. State v. Rosania, 33 N.J. 267 (1960), cert. den. 365 U.S. 864, 81 S. Ct. 828, 5 L. Ed. 2d 826 (1961); State v. Garzio, 113 N.J.L. 349 (Sup. Ct. 1934), aff'd o.b. 116 N.J.L. 189 (E. & A. 1935). Similarly, one who positions himself at a distance from the scene in order to stand watch against intervention or to avoid apprehension does not escape being stigmatized as an aider and abettor. State v. Sullivan, 77 N.J. Super. 81, 89 (App. Div. 1962). Even one who cannot be viewed as an accessory before the fact but rather as one who assented to the crime, 'lent to it his ...