The defendants in these two eases were tried together to a jury and found guilty of the crimes of conspiracy to commit robbery in the first degree, in violation of § 53a-48 of the General Statutes, robbery in the first degree, in violation of § 53a-134 (a) (2) of the General Statutes, and having a weapon in a motor vehicle, in violation of § 29-28 of the General Statutes. Although all the claims presented in their sеparate appeals are not identical, the principal issues raised are the same. Both defendants claim that the court erred in denying their motions to suppress evidence seized at the time of their arrest and in allowing the state to introduce into evidence strands of rope and two ski masks which were not used in the commission of the crimes charged in tbe informatiоns. In addition, the defendant Aeklin claims the court erred in denying his motion to dismiss the conspiracy charge. Our disposition of these three claims renders unnecessary any discussion of the defendants’ other numerous assignments of error.
A brief summary of the facts will serve to place the defendants’ claims in context. On March 21, 1974, at about 5:25 p.m., three black males, one of whom was armed with a handgun, held up Sam’s Market, a New Haven grocery store, taking cash, several packages of cigarettes and a receipt for goods recently purchased by the proprietors of the store from a wholesale concern. An eleven-year-old youth in the vicinity at the time observed three black males getting into a blue Mustang automobile with a black racing stripe across its trunk. At about *108 6 p.m., two New Haven police officers observed a vehicle meeting this description, with three black males in it, followed it until it stopped, and then approached the occupants for questioning. The driver of the blue Mustang, the defendant Acklin, was frisked by the investigating officer and a handgun was discovered on his person. Acklin and the other two occupants of the Mustаng, the defendant Wright and Joseph Miller, were then placed under arrest. A search of the persons of Acklin, Wright, and Miller, and of the automobile, disclosed a black sack containing money and the receipt taken from the grocery store, several packages of cigarettes, ammunition for the handgun, several strands of rope and two stocking masks. At the defendants’ trial, Miller was called by the state and testified that he and the two defendants had planned and perpetrated the robbery.
I
Prior to their trial, both defendants moved to suppress all the physical evidence seized at the time of their arrest, claiming that there had been no probable cause or speedy information to support that arrest. Before the evidence in question was admitted, the court held an evidentiary hearing on the motion which revealed the following pertinent facts in addition to those already summarized: At the time of the robbery, Officers Michael DiLullo and Edward Napolitano of the New Haven police department were patrolling in an unmarked police vehicle. At about 5:26 p.m., the officers received a bulletin over their cаr radio describing the robbery, the blue Mustang and the suspects. The bulletin also warned that the suspects were armed and urged caution in dealing with them. Approximately thirty minutes later, the offi *109 cers noted the defendants’ automobile on Orchard Street, approximately three or four miles from the scene of the robbery. There was nothing suspicious about the automobile or the manner in whiсh it was being driven, other than the fact that it matched the description given in the bulletin. The officers followed the Mustang until it stopped, then pulled up behind it, turned on red flashing lights, and cautiously approached it. Officer DiLullo approached the driver, Acklin, displayed his police shield, informed Acklin that he was a police officer and told Acklin to get out of the car. Acklin was not told he was under arrest at this time, nor did DiLullo intend to arrest anyone. DiLullo “patted down” Acklin and discovered the handgun. Officer Napolitano then ordered Wright and Miller out of the car and all three occupants were thereafter “contained.” When the defendants and Miller were outside of the Mustang, Officer Napolitano saw, in plain view on the front floor, a knife, sheath and strands of rope. Acklin, Wright and Miller were then searched and, when uniformed police arrived, the Mustang was searched. As a result of these searches a second knife, a box of ammunition, five packs of cigarettes, the black sack containing money and the wholesale receipt, and two stocking masks were discovered and seized in addition to Acklin’s handgun and the knife and ropes seen on the floor of the car.
The defendants contend that Officers DiLullo and Napolitano had no right to investigate the occupants of the Mustang automobile and to “frisk” Acklin, since the officers had not observed the vehicle being operated in a suspicious manner, nor did they have firsthand information linking the blue Mustang and its occupants with the robbery. Therefore, they
*110
argue, the evidеnce seized from the defendants and their automobile constitutes inadmissible “fruit” of the officers’ unlawful actions;
Wong Sun
v.
United States,
We have on recent occasions considered challenges to the validity of a stop or search of an automobile. See, e.g.,
State
v.
Love,
In the present case, Officers DiLullo and Napoli-tano were certainly “able to point to specific and articulable facts” to justify an investigation of the defendants and their automobile — the automobile and the defendants fit the description of the men and automobile sought in connection with a robbery which had occurred only one-half hour before the investigation. In light of the similarity between the vehicle sought and the vehicle occupied by the defendants, the fact that the defendants were operating the vehicle in an orderly manner is of little, if any, significance.
Nor is it significant that Officers DiLullo and Napolitano, in invеstigating the defendants, were acting upon a police bulletin rather than firsthand information. Police action may be justified by the collective knowledge of the law enforcement organization.
State
v.
Romano,
The defendants have also challenged the validity of the “pat down” which revealed the handgun in Acklin’s pocket. “When an officer is justified in believing that the individual whose suspicious behavior he is investigating at close range is armed and presently dangerous to the officer or to others, it would appear to be clearly unreasonable to deny the officer the power to take necessary measures to determine whether the person is in fact carrying a weapon and to neutralize the threat of physical harm.”
Terry
v.
Ohio,
Upon the facts of these cases, we have no doubt that the police officers were justified in investigating the defendants and in “frisking” the defendant Acklin in the course of that investigation. After the “frisk” had revealed a handgun, the officers had probable cause to arrest the defendants and to search their persons and their automobile contemporaneously with their arrest.
Chambers
v.
Maroney,
*114 II
The defendants have also assigned error in the trial court’s ruling permitting the state to introduce into evidence the strands of rope and two stocking-masks seized at the time the defendants were arrested. In the absence of the jury, the defendants objected to their admission on the ground that they were irrelevant, arguing that the masks and ropes had not been used in the actual robbery, nor was there any evidence that the defendants had planned to use them. The defendants further argued that the prejudicial impact of allowing the admission of this evidence outweighed any probative value that it might have had. The state claimed that although the items had not been used in the actual robbery of Sam’s Market on March 21, 1974, they did have probative value in that they would lend credence to the conspiracy charge. The court ruled that the ropes and masks were admissible, and the defendants took exception.
“Evidence as to articles found in the possession of an accused person subsequent to the time of the commission of a crime for which he is being tried is admissible only if it tends to establish a fact in issue or to corroborate other direct evidence in the case; otherwise the law does not sanction the admission of evidence that the defendant possessed even instruments or articles adapted to the commission of other crimes. . . . The reason is analogous to that applicable to evidence of other crimes committed by a defendant but unrelated to the offense under investigation.”
State
v.
Groos,
*115 The state offered no evidence to show that the defendants used the masks and ropes in the commission of the robbery with which they were charged, or that they had contemрlated their nse in that robbery. The third participant in the robbery, Miller, testified for the state bnt did not mention or allude to the masks or ropes in his testimony. The state’s claim that the admission of the masks and ropes would lend credence to the charge of conspiracy is, at best, tenuous. 1 The defendants were charged with conspiracy to rob Sam’s Market, and not with conspiracy to commit some other robbery. Although the masks and ropes might well have been probative of an intent to commit other robberies, they were not probative of the conspiracy with which the defendants were charged.
Ordinarily, the admissibility of evidence tending to prove other crimes is a matter for the discretion of the trial court. See, e.g.,
State
v.
Brown,
supra. Under the circumstances of this case, however, we are constrained to conclude that the prejudicial effect of the ropes and masks so far outweighed their minimal probative value that their admission into evidence constituted an abuse of the trial court’s discretion.
State
v.
Johnson,
Ill
As a new trial must necessarily be ordered, we will limit our consideration of the remaining assignments of error to a discussion of the defendant Acklin’s claim that the court erred in denying his motion to dismiss the conspiracy charge against him. The defendant argues that a prosecution both for the substantive offense of robbery and for conspiracy to commit that same robbery places him in jeopardy twice for the same offense, contrary to the fifth and fourteеnth amendments. 2
As a general rule, the double jeopardy clause does not bar prosecution of a defendant for both conspiracy to commit a substantive offense and the substantive offense itself, and, in most cases, separate sentences can constitutionally be imposed upon conviction. See
Iannelli
v.
United States,
In its most recent formulation, Wharton’s rule reads as follows: “An agreement by two persons to commit a crime cannot be prosecuted as a conspiracy when the crime is of such a nature as to necessarily require the participation of two persons for its commission.” 1 Wharton, Criminal Law & Procedure (Anderson Ed.) § 89, p. 191. In
State
v.
Kemp,
The defendant’s claim that Wharton’s rule applies in this ease cannot he sustained. The substantive offense with which he is charged is defined as follows:
“A
person is guilty of robbery in the first degree when, in the course of the commission of the crime or of immediate flight therefrom, he or another participant in the crime ... (2) is armed with a deadly weapon or dangerous instrument.” General Statutes §53a-134 (a) (2). It is cleаr from the language of the statute that participation by two or more persons, or an agreement between two or more persons, is not a necessary element of the crime of first degree robbery. Participation by two or more persons will increase third degree robbery to second degree robbery; compare General Statutes §§ 53a-135, 53a-136; but the distinctive еlement of first degree robbery (as charged in the information) is the presence of a deadly weapon. First degree robbery is not a crime “of such a nature as to necessarily require the participation of two persons for its commission” and therefore Wharton’s rule, by its own terms, is not applicable.
5
Furthermore, there were three participants in the robbery, and a well-recognized exception to Wharton’s rule renders it inapplicable where more parties participate in the conspiracy than are required for the commission of the substantive offense.
United States
v.
Becker,
There is error, the judgment in each case is set aside, and a new trial is ordered.
In this opinion the other judges concurred.
Notes
It has been noted that it is easy for police and prosecutors to abuse the use of a charge of conspiracy for the purpose of bringing in otherwise improper evidence. See 1 Miller, Criminal Law § 32, p. 110 n.7;
Krulewitch
v.
United States,
The denial of a motion to dismiss is not properly assignable as error unless a fundamental constitutional right is involved.
State
v.
L’Heureux,
“Wharton’s Eule owes its name to Francis Wharton, whose treatise on criminal law identified the doctrine and its fundamental rationale.”
Iannelli
v.
United States,
It is noted that Mr. Justice Douglas, dissenting, states: “Wharton’s Buie in its original formulation was rooted in the double jeopardy concern of avoiding multiple prosecutions.”
Iannelli
v.
United States,
It was the defendant Aeklin, himself, who was armed with a deadly weapon.
