The defendant was tried before a jury in the Superior Court on an indictment charging conspiracy to commit rape. His motion for a required finding of not guilty (Mass.R.Crim.P. 25,
At approximately 8:00 p.m. on the evening of July 16, 1977, the victim, age seventeen, went to Chicopee to visit some friends and to see her boyfriend. Upon discovering that her friends were not at home, she proceeded to the housing project where her boyfriend resided. As she passed the area of the project office, the defendant and his brother Maurice Cook attempted to engage her in conversation. Not knowing the Cooks, she spurned an invitation to join them and instead walked to her boyfriend’s residence. After ascertaining that he was not at home, she reversed her route, intending to stay at her friends’ home to await their return. As she passed the office area for the second time, she accepted the Cooks’ renewed invitation to socialize, and she sat with the two brothers on a platform talking for approximately forty-five minutes. The area apparently was used as a common meeting point for informal socializing, and while the victim was there several other people were in the vicinity, one of whom recognized the victim and called her by name. There was evidence that the Cooks smoked marihuana and drank beer but that the victim declined to smoke marihuana because her boyfriend disliked her “flying high.” She did take a drink of beer. The defendant told her that he and his brother were caring for a nearby home whose occupants were away on vacation. Because the victim was having difficulty remembering their names, the defendant told her that he worked at Smith and Wesson. He also showed her his plant identification card with his picture on it, and his brother informed her of his employer and his address and displayed his driver’s license.
About 9:00 p.m. Maurice Cook indicated that he was out of cigarettes and suggested that the three walk to a convenience store located about a minute and a half away. The victim agreed. To reach the store, the trio proceeded along the street to a narrow path or trail located behind the project office. This path led down a hill through a wooded area to the rear of a well-lit service station adjacent to the conve *670 nience store. As they “walk[ed] towards the path” single file (with Maurice in front, the victim in the middle and the defendant in the rear), the victim “slipped . . . fell or something.” She sat on the ground for a few seconds laughing when “Maurice turned around and jumped on me . . . and told me I was going to love it.” After she screamed, Maurice covered her mouth with his hand, took off his belt and gave it to the defendant seated nearby. Maurice then scratched her with a stick or blunt object and said, “No blood, no blood.” The defendant was overheard laughing and saying. “The bitch doesn’t want to bleed, we’ll make her bleed.” Maurice then forcibly raped her. During the assault the victim lost consciousness. She awoke about 11:00 p.m. and went directly to her friends’ home. The incident was subsequently reported to the police, and the Cooks were arrested. 1 Maurice was indicted for rape and the defendant, in addition to the conspiracy indictment, was charged as an accessory to the rape. G. L. c. 274, § 2, as amended by St. 1973, c. 529, § l. 2
1. A combination of two or more persons who seek by some concerted action to accomplish a criminal act may be punished as a conspiracy.
Commonwealth
v.
Hunt, 4
Met. 111, 123 (1842).
Attorney Gen.
v.
Tufts,
We are of the opinion that the evidence, tested against the foregoing principles, was insufficient to establish a conspiracy. The circumstances under which the victim and the Cooks met and socialized were not indicative of a preconceived plan between the defendant and his brother to commit a sexual assault. Rather, the meeting and subsequent engagement were consistent with a chance social encounter common between young persons. The area where the group stayed prior to setting out for the store was used frequently as a gathering spot, and there was no evidence either that the Cooks attempted to conceal from others the fact that they were with the victim or that they consciously attempted to mislead her as to their identities. The evidence cuts directly against any such inference because of the special efforts made by the defendant and his brother to identify themselves by disclosing their names and places of employment, and by showing the victim their photographs. *672 We do not think it plausible to infer that this conduct was an attempt by the Cooks to lull the victim into a false sense of security. Moreover, since all the conversation at the platform occurred in the victim’s presence, the jury could not have properly inferred that a clandestine plan to commit an assault had been formulated during that period. While openness will not automatically sanitize a conspiracy, highly visible conduct has to be considered inconsistent with the shadowy environment which usually shrouds the crime. The purpose for leaving the area was on its face innocuous and was suggested by Maurice, not the defendant. While the route chosen was arguably suspicious, the evidence established that it also was selected by Maurice, not the defendant. There was evidence that the path provided a short, reasonably direct route to a gasoline station which was nearby, well-lighted, and visible from the crest of the hill. We do not think that the events up to the time the victim fell were sufficient to establish a criminal agreement or to warrant the jury in inferring the state of facts that the Commonwealth claims to have existed.
Nor was the prosecution’s case strengthened by the circumstances surrounding the assault itself. There was no evidence that the defendant (or his brother for that matter) had anything to do with the victim’s falling to the ground. The fact that Maurice’s attack began immediately after the victim found herself in a compromising situation suggests spontaneity of action on his part rather than the purposeful execution of a predetermined plan. From that point on, the defendant’s conduct fits the classic paradigm of an accomplice adding encouragement to a crime in progress. The fact that the defendant may have aided and abetted the crime does not, as will be discussed more fully in part 2 of this opinion, establish a conspiracy, particularly where the evidence shows that prior planning is not an inherent facet of the crime. “[Njeither association with [a criminal] nor knowledge of illegal activity constitute proof of participatioii in a conspiracy.”
Roberts
v.
United States,
*673
In reaching our conclusion, we are mindful of the principle that proof of a tacit agreement to commit a crime may be enough to establish a conspiracy. See Perkins, Criminal Law 615 (2d ed. 1969). But in this case it is just as reasonable to conclude that the defendant became implicated in the crime as an accomplice after it had commenced without any advance knowledge that it was to occur, as it is to infer that the minds of the parties had met in advance “understanding^, so as to bring about an intelligent and deliberate agreement to . . . commit the offense charged.”
State v. Cole,
2. The remaining question raised by the Commonwealth’s argument is whether the defendant can be convicted of conspiracy solely on the evidence tending to show his complicity as an accomplice in the commission of the substantive crime. We think on the evidence in this case such a conclusion would be unjustified.
Accomplice and conspiratorial liability are not synonymous, and one can be an accomplice aiding in the commission of a substantive offense without necessarily conspiring to commit it. See
Pereira
v.
United States,
The judgment is reversed, the verdict is set aside, and judgment is to be entered for the defendant.
So ordered.
Notes
The Commonwealth has not argued that any of the events that occurred after the commission of the crime are probative on the question whether a conspiracy existed; accordingly we have not included those events in the summary of evidence.
“Whoever aids in the commission of a felony, or is accessory thereto before the fact by counselling, hiring or otherwise procuring such felony to be committed, shall be punished in the manner provided for the punishment of the principal felon.” Although the fact of the accessory indictment is not included in the appendix, it is apparent that it is based on a theory of accomplice liability of the type discussed in
Commonwealth
v.
Morrow,
The Commonwealth’s argument meshing the two concepts perhaps derives from misplaced reliance on Mr. Justice Holmes’ famous epigram that a conspiracy is “a partnership in criminal purposes.”
United States
v.
Kissel,
There is nothing to the contrary in Commonwealth v. Deagle, ante 563 (1980). The discussion at 566 of that opinion assumed, but without deciding, that the agreement implicit in the actual perpetration of any joint venture might be chargeable as a conspiracy, but the decision in that case turned on the absence of sufficient evidence of joint participation.
The conspiracies charged in this case and the two Federal cases next cited involved the question of responsibility of a defendant for conspiracy when he aids an existing conspiracy without knowledge that the conspiracy exists. But the sense of the rule expressed is aptly applied to this case because the rule underscores the need to look to the nature of the intended understanding to find an agreement rather than drawing the conclusion that there was a conspiracy simply from the fact of adherence by two or more people to a joint criminal venture. Professor Marcus in his compre *676 hensive empirical study of the agreement element of conspiracy describes the distinction as “in theory ... a subtle one” but in practice one of considerable importance because “punish[ing] ... a person [who adheres to a joint criminal venture] for conspiracy is to turn the theory of conspiracy on its head . . . such punishment would be for the criminal act that is the object of the combination, not for the agreement that leads to the criminal objective.” Marcus, Conspiracy: The Criminal Agreement in Theory and Practice, 65 Geo. L.J. 925, 956 (1977).
It is established law that conspiracy to commit an offense and the subsequent commission of the crime normally do not merge into a single punishable act.
Iannelli
v.
United States,
Massachusetts has been careful to restrict conspiracy to its traditional perspectives. For example, in
Commonwealth
v.
Stasiun,
8 Of course, a fact finder can consider and permissibly infer the existence of a conspiracy from the circumstances surrounding the commission of the crime. For example, the sophistication surrounding the execution of the Brink’s robbery
(Commonwealth
v.
Geagan,
