This is a search and seizure case. In this ease, and in
State v. Zutic,
155
N.J.
103,
I
On February 23, 1993, a confidential informant told Detective Robert Hilongos, an experienced member of the Narcotics Bureau of the Elizabeth Police Department, that a man was selling drugs in the lobby of the Oakwood Plaza Apartments, located at 400 Ivington Avenue in Elizabeth. The informant described the man as a black man wearing a three-quarter length jacket and a yellow cap. The informant said the man was taking orders from people in the lobby and then retrieving drugs from apartment # 2L. The informant' also said that the man was using a red Datsun parked across the street with license plate number HIO 33D.
Hilongos knew the informant and believed him to be reliable. The informant had done “one job” for Hilongos in the past, and the informant’s information resulted in an arrest and conviction. A few minutes after receiving the tip, Hilongos and two other police officers proceeded to Oakwood Plaza in an unmarked vehicle. Two uniformed officers were also called to the scene. Upon arrival, Hilongos saw a black man wearing a three-quarter length black coat and a yellow cap and standing on the sidewalk approximately fifty or sixty feet from the lobby entrance. There was a red Datsun parked across the street from the apartments, but *89 Hilongos could not remember if he saw the ear before or after stopping defendant.
Hilongos stopped and searched the man who was later identified as defendant, Shawn Smith. He seized a pair of keys from defendant. Hilongos testified that he was searching for drugs and that he knew the keys were not a weapon. None of the keys were imprinted with an apartment number or any other distinguishing marks. When asked what he was doing in the area, defendant told Hilongos that he lived in Newark but was visiting relatives in the area. Hilongos testified that he did not attempt to conduct surveillance or otherwise verify the informant’s tip because it was impracticable.
After seizing the keys, Hilongos had the two uniformed officers detain defendant while he went upstairs and knocked on apartment # 2L. He also called the apartment manager, Kathy Ryan, to the scene. While waiting for Ryan, Hilongos knocked on the door to # 2L, but no one answered. A neighbor, Andrea Smith, informed Hilongos that someone named Stacy Walker lived in the apartment but Walker was in the hospital. According to Hilon-gos’s testimony, Andrea Smith told him that Walker was her sister and defendant was her brother. Andrea Smith testified, however, that defendant is not related to her.
Either Andrea Smith or another neighbor, Patricia Wright, called Walker at the hospital. The phone was passed from Smith to Ryan and then to Hilongos. Eventually, Walker gave Hilongos permission to enter the apartment. Ryan testified that she “told [Walker] that the cops wanted to get into her unit because apparently they had somebody that had keys or something to her unit.” Hilongos testified that he could not remember if he told Walker that she had a right to refuse permission to enter the apartment. Walker testified that Ryan told her that police needed access to Walker’s apartment and they wanted permission to enter the apartment. Ryan advised Walker that she had a right to refuse access to her apartment, but warned Walker that her refusal would cause the police to obtain a search warrant and “if *90 the police had to get a warrant to get in, [Walker] would be responsible for damages because normally they break the door.” Walker testified that the police told her that they needed to enter her apartment to retrieve defendant’s wallet.
Ryan and Andrea Smith described Walker, who was pregnant and was hospitalized because of high blood pressure, as being “upset,” “crying,” and “hysterical” during their telephone conversations with her. Andrea Smith testified that “[Ryan] was trying to calm her down and I heard her telling Stacy something to the effect, no, you’re not going to lose your apartment and you have nothing to worry about and you don’t have to let them go into the house.” Walker gave Hilongos permission to enter her apartment after Ryan assured her that she would not be evicted.
After Walker consented to the entry, Hilongos entered apartment # 2L by using one of the keys he had seized from defendant. The police found inside the refrigerator a plastic bag containing fifty-nine vials of what looked like cocaine. Hilongos then “notified the officers that were holding [defendant] to place him under arrest.”
On July 1,1993, a Union County Grand Jury indicted defendant, charging him with third degree possession of a controlled dangerous substance (CDS) (count one), third degree possession of a CDS with intent to distribute (count two), and third degree possession of a CDS with intent to distribute within 1000 feet of a school (count three).
The trial court denied defendant’s motion to suppress the keys and the cocaine. The court held that whereas the seizure of the keys was unlawful, the discovery of the cocaine was lawfully based on Walker’s consent. The court held that once the cocaine was discovered, the keys would have inevitably been discovered. Therefore, the court denied the suppression motion in respect of both the keys and the cocaine. After losing the suppression motion, defendant pled guilty.
*91
Defendant appealed the denial of his motion to suppress, and the Appellate Division affirmed. 291
N.J.Super.
245,
II
Our analysis of Smith’s suppression motion begins with a consideration of whether the on-the-street search which yielded the keys was constitutional. Probable cause is ordinarily needed in order to justify a search.
See State v. Novembrino,
105
N.J.
95, 106,
In limited circumstances, police may conduct a protective search of a suspect without probable cause.
Terry v. Ohio,
392
U.S.
1, 88
S.Ct.
1868, 20
L.
Ed.2d 889 (1968). A protective search does not entail a general search of the person for evidence of crime; rather it is “designed to discover weapons that could be used to assault the officer.”
State v. Arthur,
149
N.J.
1, 14,
The Appellate Division held that Hilongos had probable cause that served as a basis for Smith’s arrest and, therefore, the ensuing personal search of Smith was undertaken as an incident to that arrest. 291
N.J.Super.
at 258,
Hilongos’s suspicions were primarily based on a tip from a confidential informant. Information related by informants may constitute a basis for probable cause. Such information, though hearsay, may provide a sufficient basis for probable cause, “so long as a substantial basis for crediting the hearsay is presented.”
Novembrino, supra,
105
N.J.
at 111,
In
Illinois v. Gates,
462
U.S.
213, 103
S.Ct.
2317, 76
L. Ed.2d
527 (1983), the United States Supreme Court held that the reliability of an informant’s tip must be analyzed under the totality of the circumstances.
Id.
at 238, 103
S.Ct.
at 2332, 76
L.
Ed.2d at 548. We adopted that test under our Constitution in
Novembrino, supra,
105
N.J.
at 122,
Two factors generally considered to be highly relevant, if not essential, that are included in the “totality of the circumstances” are the informant’s “veracity” and the informant’s “basis of knowledge.” Gates, supra, 462 U.S. at 238, 103 S.Ct. at 2332, 76 L. Ed.2d at 548. Those factors, which are considered in evaluad ing the totality of circumstance, were derived from earlier cases that invoked and applied them as necessary prongs in determining probable cause, Aguilar v. Texas, 378 U.S. 108, 84 S.Ct. 1509, 12 L. Ed.2d 723 (1964), and Spinelli v. United States, 393 U.S. 410, 89 S.Ct. 584, 21 L. Ed.2d 637 (1969)). Unlike the two-prong test that had been formulated in Aguilar and Spinelli, under which both “veracity” and “basis of knowledge” were essential elements in demonstrating probable cause, neither of these factors, though relevant, is an essential element under the totality of the circumstances test. Under Gates, a deficiency in one of the Aguilar ¡Spinelli factors “may be compensated for, in determining the overall reliability of a tip, by a strong showing as to the other, or by some other indicia of reliability.” Gates, supra, 462 U.S. at 233, 103 S.Ct. at 2329, 76 L. Ed.2d at 545. Gates recognized, in the parallel context of probable cause sufficient to obtain a search warrant, “[t]he task of the issuing magistrate is simply to make a practical, common-sense decision whether, given all the circumstances set forth in the affidavit before him, including the ‘veracity’ and ‘basis of knowledge’ of persons supplying hearsay information, there is a fair probability that contraband or evidence of a crime will be found in a particular place.” Id. at 238, 103 S.Ct. at 2332, 76 L. Ed.2d at 548.
Because each of the
Aguilar /Spinelli
factors constitutes a relevant circumstance, both must be considered in assessing all of the surrounding circumstances. The first factor focuses on the informant’s “veracity.” In looking to whether an informant demonstrates “veracity,” this Court has previously stated that past instances of reliability may establish the informant’s veracity.
*94
State v. Ebron,
61
N.J.
207, 212-13,
The second factor under
Gates,
is whether the informant had a “basis of knowledge” for the information given to the police. The basis of knowledge is relevant to a determination that the information was obtained in a rehable way.
Novembrino, supra,
105
N.J.
at 113,
The basis of knowledge for the tip can also be established by predicting hard-to-know future events- The prediction of future events can imply that the informant derived that information directly as a witness or as one privy to a reliable witness or source. The prototypical case in which prediction of future events provided the basis of knowledge for the tip is Draper v. United States, 358 U.S. 307, 79 S.Ct. 329, 3 L. Ed.2d 327 (1959). In Draper, the informant indicated that the defendant would be arriving by train from Chicago at a particular time of day and provided a description of the defendant’s physical appearance, the clothing he would be wearing, the bag he would be carrying, and the brisk pace of his gait. Id. at 309, 79 S.Ct. at 331, 3 L. Ed.2d at 329-30. It is unlikely that an informant could provide such detail about future events unless the informant had a sufficient basis of knowledge of the underlying criminal conduct. Therefore, the mere allegation that such future events will occur is sufficient to infer that the informant is at least claiming to be relying on a reliable source.
Because the information contained in an informant’s tip is hearsay and must be invested with trustworthiness to be considered as probative evidence, corroboration is an essential part of the determination of probable cause. Independent corroboration is necessary to ratify the informant’s veracity and validate the truthfulness of the tip. “[T]he informant’s veracity, if inadequately documented in the officer’s affidavit, could be bolstered by a corroborative investigation.”
Novembrino, supra,
105
N.J.
at 113,
Two cases that demonstrate the importance of corroboration are
Draper, supra,
and
State v. Hutchins,
116
N.J.
457,
In applying this analysis to the facts of this case, we may conclude that there was some evidence of the informant’s veracity. Hilongos stated he believed the informant to be reliable because “[h]e did a job for me in the past.” Under
Aguilar ISpinelli
a single instance of past reliability would have been sufficient evidence of the veracity factor.
See Ebron, supra,
61
N.J.
at 212-13,
The “basis of knowledge” factor must also be assessed under the totahty of circumstances in accordance with its weight. Although the informant did state that the transactions were going on “at that time,” the informant did not expressly allege or otherwise indicate the source or basis of his or her knowledge in relating the tip. As noted, the contents of a tip, particularly the kind of factual details provided, can inferentially estabhsh the informant’s claim of a rehable basis of knowledge. The tip here alleged that defendant was meeting people in the lobby, going into apartment # 2L, and returning to the lobby to give the people drugs. It also mentioned that a particular car used by defendant was located on the street in the area. The Appellate Division found that “in ah likelihood only one conversant with the criminal activity would know” those details. 257
N.J.Super.
at 257,
The evidentiary weakness of the basis-of-knowledge factor under the totality of the circumstances test goes only to the weight and does not as such necessarily establish the absence of probable cause. Even where the tip lacks sufficient detail to establish a basis of knowledge, independent police investigation and corroboration of the detail in the tip must be considered because it may in some circumstances add to the evidentiary weight of factors as well as the overall circumstances. In reaching the conclusion that the police had probable cause, the Appellate Division observed that the police corroborated the informant’s description of the suspect, the modus operandi, and the use of the red Datsun. 291
N.J.Super.
at 257-58,
Finally, we note that Hilongos’s extensive experience with drag transactions did not contribute to the existence of probable cause in this case. Certain suspicious behavior may lead an experienced police officer to suspect that a person is engaged in criminal activity.
See, e.g., Arthur, supra,
149
N.J.
at 9,
*100 In sum, we conclude that in the totality of the circumstances, Hilongos did not have probable cause when he searched defendant. Although the informant’s veracity is bolstered by one prior occasion of reliability, doubts concerning potential ulterior motives must remain. Also, the easy-to-know detail in the tip did not imply a reliable basis of knowledge. Finally, the police corroboration of that easy-to-predict detail did not bolster the informant’s reliability in respect of the allegation of criminal activity. Taken as a whole, these circumstances did not amount to probable cause. Therefore, the personal search of defendant and seizure of the keys from defendant were unlawful.
Ill
Because the personal search of defendant was not based on probable cause and was unreasonable, the next issue presented is whether the discovery of the drugs in apartment # 2L was based on the seizure of the keys to the apartment that were obtained as a result of the unlawful search of the defendant and, if so, whether that renders the subsequent search and seizure of evidence from the apartment unlawful.
Evidence obtained as the fruit of an unlawful search or seizure must be suppressed.
Wong Sun v. United States,
371
U.S.
471, 83
S.Ct.
407, 9
L.
Ed.2d 441 (1963);
State v. Barry,
86
N.J.
80, 87,
Both lower courts ruled that the seizure of drugs from the apartment was reasonable because access to the apartment was based on Walker’s consent. Implicit in that conclusion is that the antecedent search of defendant, which resulted in the seizure of the keys to the apartment, did not lead to or significantly influence Walker’s consent.
Although Walker’s decision to give consent cannot be ascribed to a single reason or motive, it is clear that it was heavily influenced by the unlawful seizure of the keys from defendant. Walker knew that the police had obtained keys to her apartment from defendant, and that knowledge was a major factor in her decision to give consent to the police to enter the apartment to investigate. Thus, Walker’s consent was not an independent intervening circumstance. A consent to search that is attributable to police misconduct involving the violations of constitutional rights may be regarded as the product of that unconstitutional conduct and an invalid basis on which to justify a search.
State v. Johnson,
120
N.J.
263, 288,
The Appellate Division also ruled that defendant had no expectation of privacy in the apartment and consequently had no standing to challenge the reasonableness of the search of the
*102
apartment and the seizure of the drug contraband. The circumstances of this case do not require consideration of the issue of standing.
See Arthur, supra,
149
N.J.
at 13,
IV
The judgment of the Appellate Division is reversed.
PORITZ, C.J., GARIBALDI, J., and COLEMAN, J., dissenting.
We would affirm the judgment below substantially for the reasons expressed in the opinion of the Appellate Division, which is reported at 291
N.J.Super.
245,
For reversal — Justices HANDLER, POLLOCK, O’HERN and COLEMAN — 4.
For affirmance — Chief Justice PORITZ, and Justices GARIBALDI and COLEMAN — 3.
