delivered the opinion of the Court.
The trial court accepted respondent John Franklin Pro-sise’s plea of guilty to one count of manufacturing a controlled substance — phencyclidine. At the hearing at which respondent pleaded guilty, a police officer gave a brief account of the search of respondent’s apartment that led to the discovery of material typically used in manufacturing this substance. Thereafter, Prosise brought a damages action under 42 U. S. C. § 1983 in Federal District Court against petitioner Gilbert A. Haring and the other officers who participated in the search of his apartment. The question presented by this case is whether respondent’s § 1983 claim is barred by his prior guilty plea.
Í — f
On April 27, 1978, pursuant to a plea agreement, Prosise pleaded guilty in the Circuit Court for Arlington County, Va., to one count of manufacturing phencyclidine. The Commonwealth then called one witness, Detective Henry Allen of the Arlington County Police Department. Allen testified that on September 7, 1977, he responded to a radio call directing him to an Arlington apartment which turned out to be leased to Prosise. By the time he arrived, two uniformed officers had placed Prosise under arrest for the possession of a controlled substance. After entering the apartment, Allen noticed various chemicals in the apartment as well as a quantity of what he believed to be phencyclidine. A warrant was later obtained for a search of the apartment. Allen and Detective Petti then conducted a search which led to the seizure of devices, and chemicals used to manufacture phencyclidine, *309 receipts for such chemicals, a paper containing a formula for making phencyclidine, and two buckets containing traces of the substance.
At the conclusion of Allen’s testimony, the judge accepted Prosise’s guilty plea, finding that it had been entered voluntarily and intelligently and that it had a sufficient basis in fact. On June 23, 1978, the court denied Prosise’s motion to withdraw his plea and sentenced him to 25 years’ imprisonment. 1
On January 23, 1979, while under confinement in the Arlington Detention Center, Prosise filed a pro se action under 42 U. S. C. § 1983 against Lt. Gilbert A. Haring and various other members of the Arlington County Police Department who had participated in the search of his apartment. His complaint alleged that the officers had unlawfully searched his apartment prior to obtaining a search warrant, and that after obtaining the warrant the officers conducted a search that exceeded the scope of the warrant.
The District Court granted summary judgment for defendants on the ground that Prosise’s guilty plea to the charge of manufacturing phencyclidine barred his § 1983 claim. The court reasoned that Prosise’s failure to assert his Fourth Amendment claim in state court constituted a waiver of that right, precluding its assertion in any subsequent proceeding. It relied primarily on this Court’s decision in
Tollett
v.
Henderson,
“If a defendant who pleads guilty is foreclosed from obtaining his freedom because of an illegal search and seizure, he should not be allowed to secure damages in a § 1983 suit and thereby litigate the antecedent constitutional question relating to the search that could not otherwise be heard because of Tollett.”
The District Court also appears to have held that Prosise’s plea of guilty constituted an implied admission that the search of his apartment was legal. The court stated that even though the constitutionality of the police conduct was not litigated in the state criminal proceedings, Prosise’s “plea of guilty estops him from asserting a fourth amendment claim in a § 1983 suit [because his] plea of guilty necessarily implied that the search giving rise to the incriminating evidence was lawful.”
The Court of Appeals reversed in pertinent part and remanded for further proceedings.
*311 The Court of Appeals concluded that in any event a guilty plea should not “have preclusive effect as to potential but not actually litigated issues respecting the exclusion of evidence on fourth amendment grounds.” Id., at 1140-1141. The court cited the general view of courts and commentators that “among the most critical guarantees of fairness in applying collateral estoppel is the guarantee that the party sought to be estopped had not only a full and fair opportunity but an adequate incentive to litigate ‘to the hilt’ the issues in question.” Id., at 1141. Unlike a criminal defendant who has been convicted after a full trial on the criminal charges, a defendant who pleads guilty has not necessarily had an adequate incentive to litigate “with respect to potential but unlitigated issues related to the exclusion of evidence on fourth amendment grounds.” Ibid.
After the Court of Appeals denied rehearing,
id.,
at 1143, petitioners’ suggestion for rehearing en banc was denied by an equally divided court.
Ibid.
We granted certiorari,
*312 l — l
We must decide whether Prosise s § 1983 action 3 to redress an alleged Fourth Amendment violation 4 is barred by the judgment of conviction entered in state court following his guilty plea. Petitioners’ initial argument is that under principles of collateral estoppel generally applied by the Virginia courts, Prosise’s conviction would bar his subsequent civil challenge to police conduct, and that a federal court must therefore give the state judgment the same effect under 28 U. S. C. § 1738. 5
In
Allen
v.
McCurry,
We begin by reviewing the principles governing our determination whether a §1983 claimant will be collaterally es-topped from litigating an issue on the basis of a prior state-court judgment. Title 28 U. S. C. § 1738 generally requires “federal courts to give preclusive effect to state-court judgments whenever the courts of the State from which the judgments emerged would do so.”
Allen
v.
McCurry,
The threshold question is whether, under the rules of collateral estoppel applied by the Virginia courts, the judgment of conviction based upon Prosise’s guilty plea would foreclose him in a later civil action from challenging the legality of a search which had produced inculpatory evidence. 8 Because there is no Virginia decision precisely on point, we must look for guidance to Virginia decisions concerning collateral estop-pel generally. While it is often appropriate to look to the law as it is generally applied in other jurisdictions for additional guidance, we need not do so in this case because the state-law question is not a particularly difficult one.
The courts of Virginia have long recognized that a valid final “ ‘judgment rendered upon one cause of action’ ” may bar a party to that action from later litigating “ ‘matters arising in a
*315
suit upon a different cause of action.’”
Eason
v.
Eason,
*316 It is clear from the foregoing that the doctrine of collateral estoppel would not be invoked in this case by the Virginia courts for at least three reasons. First, the legality of the search of Prosise’s apartment was not actually litigated in the criminal proceedings. Indeed, no issue was “actually litigated” in the state proceeding since Prosise declined to contest his guilt in any way. Second, the criminal proceedings did not actually decide against Prosise any issue on which he must prevail in order to establish his § 1983 claim. The only question raised by the criminal indictment and determined by Prosise's guilty plea in Arlington Circuit Court was whether Prosise unlawfully engaged in the manufacture of a controlled substance. This question is simply irrelevant to the legality of the search under the Fourth Amendment or to Prosise’s right to compensation from state officials under § 1983.
Finally, none of the issues in the § 1983 action could have been “necessarily” determined in the criminal proceeding. Specifically, a determination that the county police officers engaged in no illegal police conduct would not have been essential to the trial court’s acceptance of Prosise’s guilty plea. Indeed, a determination that the search of Prosise’s apartment was illegal would have been entirely irrelevant in the context of the guilty plea proceeding. Neither state nor federal law requires that a guilty plea in state court be supported by legally admissible evidence where the accused’s valid waiver of his right to stand trial is accompanied by a confession of guilt. See
Kibert
v.
Commonwealth,
*317 We therefore conclude that Virginia law would not bar Prosise from litigating the validity of the search conducted by petitioners. Accordingly, the issue is not foreclosed under 28 U. S. C. § 1738.
Ill
We turn next to petitioners’ contention that even if Prosise’s claim is not precluded under §1738, this Court should create a special rule of preclusion which nevertheless would bar litigation of his § 1983 claim. As a general matter, even when issues have been raised, argued, and decided in a prior proceeding, and are therefore preclusive under state
*318
law, “[r]edetermination of [the] issues [may nevertheless be] warranted if there is reason to doubt the quality, extensiveness, or fairness of procedures followed in prior litigation.”
Montana
v.
United States,
There is no justification for creating such an anomalous rule. To begin with, Prosise’s guilty plea in no way constituted an admission that the search of his apartment was proper under the Fourth Amendment. During the course of proceedings in Arlington County Circuit Court, Prosise made no concession with respect to the Fourth Amendment claim.
Petitioners contend that we should infer such an admission because Prosise had a substantial incentive to elect to go to trial if he considered his Fourth Amendment claim meritorious since the State would most likely have been unable to obtain a conviction in the absence of the evidence seized from Prosise’s apartment. In our view, however, it is impermissible for a court to assume that a plea of guilty is based on a defendant’s determination that he would be unable to prevail on a motion to suppress evidence. As we recognized in
Brady
v.
United States,
“For some people, their breach of a State’s law is alone sufficient reason for surrendering themselves and ac *319 cepting punishment. For others, apprehension and charge, both threatening acts by the Government, jar them into admitting their guilt. In still other cases, the post-indictment accumulation of evidence may convince the defendant and his counsel that a trial is not worth the agony and expense to the defendant and his family.”
Similarly, a prospect of a favorable plea agreement or “the expectation or hope of a lesser sentence . . . are considerations that might well suggest the advisability of a guilty plea without elaborate consideration of whether [a Fourth Amendment challenge to the introduction of inculpatory evidence] might be factually supported.”
Tollett
v.
Henderson, supra,
at 268. Therefore, Prosise’s decision not to exercise his right to stand trial cannot be regarded as a concession of any kind that a Fourth Amendment evidentiary challenge would fail. Cf.
Brown
v.
Felsen,
We similarly reject the view, argued by petitioners and accepted by the District Court, that by pleading guilty Prosise “waived” any claim involving an antecedent Fourth Amendment violation. Petitioners rely on our prior decisions concerning the scope of federal habeas review of a criminal conviction based upon a guilty plea. See,
e. g., Brady
v.
United States, supra; Tollett
v.
Henderson, supra; Blackledge
v.
Perry,
Our decisions subsequent to
Tollett
make clear that a plea of guilty does not bar the review in habeas corpus proceedings of all claims involving constitutional violations antecedent to a plea of guilty. A defendant who pleads guilty may seek to set aside a conviction based on prior constitutional claims which challenge “the very power of the State to bring the defendant into court to answer the charge brought against him.”
Blackledge
v.
Perry,
Under our past decisions, as the District Court correctly recognized, a guilty plea results in the defendant’s loss of any meaningful opportunity he might otherwise have had to challenge the admissibility of evidence obtained in violation of the Fourth Amendment. It does not follow, however, that a guilty plea is a “waiver” of antecedent Fourth Amendment claims that may be given effect outside the confines of the criminal proceeding. The defendant’s rights under the Fourth Amendment are not among the trial rights that he *321 necessarily waives when he knowingly and voluntarily pleads guilty. Moreover, our decisions provide no support for petitioners’ waiver theory for the simple reason that these decisions did not rest on any principle of waiver. The cases relied on by petitioners all involved challenges to the validity of a state criminal conviction. Our decisions in Tollett and the cases that followed simply recognized that when a defendant is convicted pursuant to his guilty plea rather than a trial, the validity of that conviction cannot be affected by an alleged Fourth Amendment violation because the conviction does not rest in any way on evidence that may have been improperly seized. State law treats a guilty plea as “a break in the chain of events [that] preceded it in the criminal process,” Tollett v. Henderson, supra, at 267. Therefore, the conclusion that a Fourth Amendment claim ordinarily may not be raised in a habeas proceeding following a plea of guilty does not rest on any notion of waiver, but rests on the simple fact that the claim is irrelevant to the constitutional validity of the conviction. As we explained in Menna v. New York, supra, at 62-63, n. 2:
“[W]aiver was not the basic ingredient of this line of cases. The point of these cases is that a counseled plea of guilty is an admission of factual guilt so reliable that, where voluntary and intelligent, it quite validly removes the issue of factual guilt from the case. In most cases, factual guilt is a sufficient basis for the State’s imposition of punishment. A guilty plea, therefore, simply renders irrelevant those constitutional violations not logically inconsistent with the valid establishment of factual guilt and which do not stand in the way of conviction, if factual guilt is validly established.” (Emphasis in original; citation omitted.)
It is therefore clear that Prosise did not waive his Fourth Amendment claims by pleading guilty in state court. The cases relied on by petitioners do not establish that a guilty plea is a waiver of Fourth Amendment claims. Moreover, the *322 justifications for denying habeas review of Fourth Amendment claims following a guilty plea are inapplicable to an action under §1988. While Prosise’s Fourth Amendment claim is irrelevant to the constitutionality of his criminal conviction, and for that reason may not be the basis of a writ of habeas corpus, that claim is the crux of his § 1983 action which directly challenges the legality of police conduct. 11
Adoption of petitioners’ rule of preclusion would threaten important interests in preserving federal courts as an available forum for the vindication of constitutional rights. See
England
v.
Medical Examiners,
HH <
We conclude that respondent’s conviction m state court does not preclude him from now seeking to recover damages under 42 U. S. C. § 1983 for an alleged Fourth Amendment violation that was never considered in the state proceedings. Accordingly, the judgment of the Court of Appeals is
Affirmed.
Notes
On July 17, 1979, the Supreme Court of Virginia denied respondent’s petition for a writ of error to review the trial court’s decision that his plea was voluntary and its refusal to permit the withdrawal of the plea.
In
Metros
v.
United States District Court for the District of Colorado,
Title 42 U. S. C. § 1983 at the time in question provided:
“Every person who, under color of any statute, ordinance, regulation, custom, or usage, of any State or Territory, subjects, or causes to be subjected, any citizen of the United States or other person within the jurisdiction thereof to the deprivation of any rights, privileges, or immunities secured by the Constitution and laws, shall be liable to the party injured in an action at law, suit in equity, or other proper proceeding for redress.”
The Fourth Amendment provides:
“The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated; and no Warrants shall issue but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.”
Title 28 U. S. C. § 1738 provides, in relevant part, that the “Acts, records and judicial proceedings” of any State, Territory, or Possession “shall have the same full faith and credit in every court within the United States and its Territories and Possessions as they have by law or usage in the courts of such State, Territory or Possession from which they are taken.”
If the state courts would not give preclusive effect to the prior judgment, “the courts of the United States can accord it no greater efficacy” under § 1738.
Union & Planters’ Bank
v.
Memphis,
We have recognized various other conditions that must also be satisfied before giving preclusive effect to a state-court judgment. See generally
Montana
v.
United States,
It is our practice to accept a reasonable construction of state law by the court of appeals “even if an examination of the state-law issue without such guidance might have justified a different conclusion.”
Bishop
v.
Wood,
Like the federal courts, the courts of Virginia apply different rules of preclusion to matters arising in a suit between the same parties and based upon the same causes of action as those involved in the previous proceeding. Under the doctrine of res judicata, “ ‘the judgment in the former [action] is conclusive of the latter, not only as to every question which was decided, but also as to every other matter which the parties might have litigated and had determined, within the issues as they were made or tendered by the pleadings, or as incident to or essentially connected with the subject matter of the litigation, whether the same, as a matter of fact, were or were not considered.’”
Eason
v.
Eason,
The court below found that, even if the Fourth Amendment issue had been litigated and necessarily determined by the state court, that determination would not be given preclusive effect for an additional reason: under Virginia law, “‘a judgment rendered in a criminal prosecution, whether of conviction or acquittal, does not establish in a subsequent civil action the truth of the facts on which it is rendered.’ ”
In one reported case, however, the highest court of the State has allowed a stranger to a criminal conviction to invoke the doctrine of collateral estop-pel in an action brought against him by the convicted person.
Eagle, Star & British Dominions Ins. Co.
v.
Heller,
Although petitioners also contend that a special federal rule of preclusion is necessary to preserve important federal interests in judicial administration, we fail to understand how any such interests justify the adoption of a rule that would bar the assertion of constitutional claims which have never been litigated. See
Allen
v.
McCurry,
