with whom Mr. Justice Douglas joins, dissenting.
Four years have passed since we decided Terry v. Ohio,. 392 U. S. 1 (1968), and its companion cases, Sibron v. New York and Peters v. New York, 392 U. S. 40 (1968). They were the first cases in which this Court explicitly recognized the concept of “stop and frisk-” and squarely held that police officérs may, under appropriate circumstances, stop and frisk persons suspected of criminal activity even though there is less' than probable cause for an arrest. This case marks our first opportunity to give some flesh to the bones of Terry *154et al. Unfortunately, the flesh provided by. today’s decision cannot' possibly be made to fit on Terry’s skeletal framework.
“[T]he most basic constitutional rule in this area is that 'searches conducted outside the judicial process, without prior approval by judge or magistrate, are per se unreasonable under the Fourth Amendment — subject only to a few specifically established and well-delineated exceptions.’ The exceptions are 'jealously and carefully drawn,’ and there must be 'a' showing by those who seek exemption . . . that the exigencies of the situation made that course imperative.’ '[T]he burden is on-those seeking the exemption to show the need for it.’ ” Coolidge v. New Hampshire, 403. U. S. 443, 454-455 (1971). In Terry we said that, “we do not retreat from our holdings that the police must, whenever practicable, obtain advance judicial approval of searches and seizures through the warrant procedure.” 392 U. S., at 20. Yet, we upheld the stop and frisk in Terry because we recognized that the realities of on-the-street. law enforcement require an officer to act at times on the basis of strong evidence, short of probable cause,. that criminal activity is taking place and that the criminal is armed and dangerous. Hence, Terry stands only for the proposition that police officers have a “narrowly drawn authority to ... . search for weapons” without a warrant. ' Id., at 27.
In today’s decision the Court ignores the fact that Terry begrudgingly accepted the necessity -for creating an exception from the warrant requirement of the Fourth Amendment and treats this case as if warrantless searches were the rule rather than the “narrowly drawn” exception. This decision betrays the careful balance that Terry sought to strike between a citizen’s right to privacy and his.government’s responsibility for effective law enforcement and expands the concept of warrantless *155searches far beyond anything heretofore recognized as legitimate. I dissent.
I
A. The Court’s opinion states the facts and I repeat only those that appear to me to be relevant to the Fourth Amendment issues presented.
Respondent was sitting on the passenger side of the front seat of a cat parked on the street in a “high crime area” in Bridgeport, Connecticut, at 2:15 a. m. when a police officer approached his car. During a conversation that had just taken place nearby, the officer was told by an informant that respondent had narcotics on his person and that he had a gun in his waistband. The officer saw that the motor was not running, that respondent was seated peacefully in the car, and that there was no indication that he was about to leave the scene. After the officer asked respondent to open the door, respondent rolled down his window instead and the officer reached into the car and pulled a gun from respondent’s waistband. The officer immediately placed respondent under arrest for carrying the weapon and searched him, finding heroin in his coat. More heroin was found in a later search of the automobile. Respondent -moved to suppress both the gun and the heroin prior to trial. His motion was denied and he was convicted of possessing both items.
B. The Court erroneously attempts to describe the search for the gun as a protective search incident to a reasonable investigatory stop. But, as in Terry, Sibron and Peters, supra, there is no occasion in this case to determine whether or not police officers have a right to seize and to restrain a citizen in order to interrogate him. The facts are clear' that the officer intended to make the search as soon as he approached the respondent. He asked no questions; he made no investigation; he simply searched. *156There was nothing apart from the information supplied by. the informant to cause the officer to search. Our inquiry must focus, therefore, as it did in Terry on whether the officer had sufficient facts from which he could reasonably infer that respondent was not only engaging in illegal activity, but also that he was armed and dangerous. The focus falls on the informant.
The only information that the informant had previously given the officér involved homosexual conduct in the local railroad station. The following colloquy took place between respondent’s counsel and the officer at the hearing on respondent’s motion to suppress the evidence that had been seized from him.
“Q. Now, with respect to the information that was given you about homosexuals in the Bridgeport Police Station [stc], did that lead to an arrest? A. No.
“Q. An arrest was not made. A. No. There was no substantiating evidence.
“Q. There was no substantiating evidence? - A. No., ■
“Q. And what do you mean by that? A*. I didn’t have occasion to witness these individuals committing any crime of any nature.
“Q. In other words, after this person gave you the information, you checked for corroboration, before you made an arrest. Is that right? A. Well, I checked to determine the possibility of homosexual activity.
“Q. And since an arrest was made, I take it you didn’t find any substantiating information. A. I’m sorry counselor, you say since an arrest was made.
“Q. Was not made. Since an arrest was not made, I presume you didn’t find any substántiating information. A. No.
*157“Q. So that, you don’t recall any other specific, information given you about the commission of crimes by this informant. A. No.
“Q. And you still thought this person was reliable. A. Yes.”1
Were we asked'to determine whether the information supplied by the' informant was sufficient to provide probable cause, for an arrest and search, rather than a stop and frisk, there can be no doubt that we would hold that it was insufficient. This Court has squarely held that a search and seizure cannot be justified on the basis of conclusory allegations of an unnamed informant who is allegedly credible. Aguilar v. Texas, 378 U. S. 108 (1964). In the recent case of Spinelli v. United States, 393 U. S. 410 (1969), Mr. Justice Harlan made it plain beyond any doubt that where police rely on an informant to make a search and seizure, they must know that the informant is generally trustworthy and that he- has obtained his information in a reliable way. Id., at 417. Since the testimony of the arresting officer in the instant case patently fails to demonstrate that the informant was known, to be trustworthy and since it is also clear that''the officer had no idea of the source of the informant’s “knowledge,” a search and seizure would have been illegal.
Assuming, arguendo, that this case truly involves, not an arrest, and a search incident thereto, but a stop and frisk,2 we must decide whether or not the information possessed by the officer justified this interference with respondent’s liberty. Terry, our only case to actually *158uphold a stop and frisk,3' is not directly in point, because the police officer in that case acted on the basis of his own personal observations. No informant was involved. But the rationale of Terry is still controlling, and it requires that we condemn the conduct of the police officer in encountering the respondent.
Terry did not hold that whenever a policeman has á hunch that a citizen is engaging in criminal activity, he may engage in a stop and frisk. It held that if police officers want to stop and frisk, they must have specific facts from which, they can reasonably infer that an individual is engaged in criminal activity and is armed and dangerous.4 It was central to our decision in Terry that the police officer acted on the basis of his own personal observations and that he carefully scrutinized the conduct of his suspects before interfering with them in any way. When we legitimated the conduct of the officer in Terry we did so because of the substantial reliability of the information, on which the officer based his decision to act.
If the Court does not ignore the care with which we examined the knowledge possessed by the officer in Terry when he acted, then I cannot see how the actions of the officer in this case can be upheld. The Court explains what the officer knew about respondent before accosting him. But what is more significant is what he- did not know. With respect to the scene generally, the officer had no idea how long respondent had been in the car, how long the car had been parked, or to whom the car belonged. With respect to the gun,5 the officer did not *159know if or when the informant had ever seen the gun, or whether the gun was carried legally, as Connecticut law permitted, or illegally.6 And with respect to the narcotics, the officer did not know what kind of narcotics respondent allegedly had, whether they were legally or illegally possessed, what the basis of the informant’s knowledge was, or even whether the informant was capable of distinguishing narcotics from other substances.7
Unable to answer any of these questions, the officer nevertheless determined that it was necessary to intrude on respondent’s liberty. I believe that his determination was totally unreasonable. As I read Terry, an officer may act on the basis of reliable information. short of • probable cause to make a stop, and ultimately a frisk, if necessary; but the officer may not use unreliable, unsubstantiated, conclusory hearsay to justify an invasion of liberty. Terry never meant to approve the kind, of knee-jerk police reaction that we have before us in this case.
Even assuming that the officer had some legitimate reason for relying on the informant, Terry requires, before any stop and frisk is made, that the reliable information in the officer’s possession demonstrate that the suspect is both armed and dangerous8, The fact remains that *160Connecticut specifically authorizes persons to .carry guns so long as they have a permit. Thus, there "was no reason for the officer to infer from anything that the informant, said that the respondent was dangerous. His-frisk was, therefore, illegal under Terry.
II
Even if I could agree with the Court that the stop and frisk in this case was proper, I could not go further and sustain the arrest and the subsequent searches. It takes probable cause to justify an arrest and search and seizure incident thereto. Probable cause means that the “facts and circumstances before the officer are such as to warrant a man of prudence and caution in believing that the offence has been committed.. . . .” Stacey v. Emery, 97 U. S. 642, 645 (1878). “[G]ood faith is not enough to constitute probable cause.”' Director General v. Kastenbaum, 263 U. S. 25, 28 (1923).
Once the officer seized the gun from respondent, it is uncontradicted that he did not ask whether respondent had a license to carry it, or whether respondent carried it for any other legal reason under Connecticut law. Rather, the officer placed him under arrest immediately and hastened to search his person. Since Connecticut has not made it illegal for private citizens to carry guns,' there is nothing in the facts of this case to warrant a man “of prudence and caution” to believe that any offense had been committed merely because respondent had a gun on his person.9 Any implication that respondent’s silence *161was some sort of a tacit admission of guilt would be utterly absurd.
It is simply' not reasonable to expect someone to protest that he is not acting illegally before he is told that he, is suspected of criminal activity. It would have been a simple matter for the officer to ask whether respondent had a permit, but he chose not to do so. In making this choice, he clearly violated the Fourth Amendment.
This case marks a departure from the mainstream of our Fourth Amendment cases. In Johnson v. United States, 333 U. S. 10 (1948), for example, the arresting officer had an informant’s tip and actually smelled opium coming from a room. This Court'still found the arrest unlawful. And in Spinelli v. United States, 393 U. S. 410, we found that there was no probable cause even where an informant’s information was corroborated by personal observation. If there was no probable cause in those' cases, I find it impossible to understand how there can be probable cause in this case.
Ill
Mr. Justice Douglas was the sole dissenter in Terry. He warned of the “powerful hydraulic pressures throughout our history that bear heavily on the Court to water down constitutional guarantees . . . .” 392 U. S., at 39. While I took the position then that we were not watering down rights, but were hesitantly and cautiously striking a necessary balance between the rights of Américan citizens to be free from government intrusion into their *162privacy and their government’s urgent need for a narrow exception to the warrant requirement of the Fourth Amendment, today’s decision demonstrates just how prescient Me. Justice Douglas was.
It seems that the delicate balance that Terry struck was simply too delicate, too susceptible to the “hydraulic pressures” of the day. As a result of today’s decision, the balance struck in Terry is now heavily weighted in favor of the government. And the Fourth Amendment, which was included in the Bill of Rights to prevent the kind of arbitrary and oppressive police action involved herein, is dealt a serious blow. Today’s decision invokes the specter of a society in which innocent citizens may be stopped, searched, and arrested at the whim of police officers who have only the slightest suspicion of improper conduct,
App, 96-97.
Terry v. Ohio, 392 U. S. 1 (1968), makes it clear that' a stop and frisk is a search and seizure within the meaning of the Fourth Amendment. When I use the term stop and frisk herein, I merely intend to emphasize that it is, as Terry held, a lesser intrusion than a full-scale search and. seizure.
In Sibron v. New York, 392 U. S. 40 (1968), the Court held that the action of the policeman could not be justified as a stop and . frisk. In Peters v. New York, 392 U. S. 40 (1968), the Court sustained the validity of a search and seizure by holding that' it was incident to a legal arrest.
Terry v. Ohio, 392 U. S., at 29; Sibron v. New York, 392 U. S., at 64.
The fact that the respondent carried his gun in a high-crime area *159is irrelevant. In such areas it is more' probable than not that citizens would be more likely 'to carry weapons authorized by the State to protect themselves.
See Conn. Gen. Stat. Rév. § 29-35.
Connecticut permits possession of certain narcotics under specified circumstances — e. g., pursuant to a doctor’s prescription. See Conn. Gen: Stat. Rev. §§ 19-443, 19r456 (c). 19-481.
The Court virtually ignores , the requirement that the suspect bdangerous, as well as armed. Other courts have followed Terry more closely. See, e. g., Commonwealth v. Bourke, 218 Pa. Super. 320, 323, 280 A. 2d 425, 427 (1971); Commonwealth v. Clarke, 219 Pa. Super. 340, 343, 280 A. 2d 662, 663 (1971); Finley v. People, 176 Colo. 1, 488 P. 2d 883 (1971). See also State v. Goudy, 52 Haw. 497, 505, 479 P. 2d 800, 805 (1971) (Abe, J., dissenting).
The Court appears to rely on the fact that the existence of the gun corroborated the information supplied to the officer by the informant. It cannot be disputed that there is minimal corroboration here, but the fact remains that the officer- still lacked any knowledge that respondent had done anything illegal. Since carrying a gun is not per se illegal in Connecticut, the fact .that respondent carried *161a gup is no more relevant to probable cause than the, fact that his shirt may have been blue, or that he was wearing a jacket.. Moreover, the fact that the informant can identify a gun on sight does not indicate an ability to do the same with narcotics. The corroboration of this one fact is a far cry from the corroboration that the Court found sufficient to sustain an arrest in Draper v. United States, 358 U. S. 307 (1959).