concurring:
I do not disagree with the legal analysis of the other opinions in this case. My prob*605lems are with the factual application. If the statute of limitations is tolled in this case it is because of the concealment doctrine, which is applicable when defendants conceal the existence of a cause of action from the plaintiff. I agree that the statute of limitations on the 42 U.S.C. § 1983 claim did not commence to run until Vest knew of the involvement of at least one state actor. But Vest’s statements and admissions from his deposition convince me that he knew or reasonably should have known of the involvement of Judge Burns, and perhaps of the sheriff and others in official positions, in the alleged conspiracy against him.
In his deposition Vest stated that he suspected the involvement of Judge Burns:
“A. Up to this time, I had suspicions of why they placed charges upon me in Cedar City. One was my running argument with Mayor Weckon concerning the loss of Glen Canyon power. I am a specialist in the area of ecology and energy sources, and I constantly was stating that the mayor should not be in the position he was in with the conflict between Cal Pac and the Glen Canyon Power. I had suspicions that that might be the reason. I was told that Judge Burns was his close friend, and I was also told that a very close friend of Judge Burns stated that only the Supreme Court could ever stop them from nailing me.”
Deposition of Edwin Dean Vest at 17.
A few minutes earlier in his deposition testimony Vest described the events in Judge Burns’ chambers when the prosecutor had to drop the sodomy charges.
“Q. What happened at the trial itself?
A. We went into the chambers and Hans Chamberlain said that he had sent Sheriff Schoppman for Perry Buoy and he had eluded him. Sheriff Schoppman or his representative had finally brought him to his office, and very regretably that this damage had been done to this man, very regretably Perry Buoy told him he had lied. And the judge didn’t even bat an eye. He says, ‘What else can we get him on?’
My lawyer got me aside and said, ‘They will not let you out of this town unless you plead guilty to something.’ And Hans said, ‘If you will plead guilty to illegal touch — ’ I think was the term he used ‘ — they will give you six months’ suspended sentence and you can go on your way. You will be charged with flipping Perry Buoy with the back of your hand in his office.’ Now, he wasn’t facing me in my office, so I flipped his shoulder with the back of my hand, and I was charged with illegal touch. And the judge asked me if I did that, and I said yes. The judge said, ‘Now, you have done that on your free will?’
I said, ‘Yes.’ It is in the transcript of the trial.
‘All right. Six months in the county jail. Suspended upon the fact that— six months in the county jail, but arrange with Hans Chamberlain and your lawyer that you can be incarcerated in the Veterans Hospital for treatment.’ And he leaned over and he said, ‘Dr. Vest, you are a very ill man,’ indicating I was very insane.
Now, Mr. Cline gave me a Minneapolis Multiphasic test, and he said that I was ‘criminally insane.’ And I presume this was connected here.”
Id. at 11-12.
If Judge Bums made the statements described above, as Vest contends, they put Vest on notice that the judge and perhaps the sheriff were part of the alleged conspiracy to drive him out of the town.
Other events described by Vest are not as clear with regard to the involvement of a state official, but when added to the recitals above, the events should have indicated to Vest involvement of the judge or other state actors.
“A. No, I know nothing about it. After he came out to the car and told me that the whole town tried to run me out of town and so on, then the head of the Boys Home — I went for a tape recorder. I said, ‘Will you tell me the story?’
*606And I went for the tape recorder, and when I got back, why, the head of the Boys Home had received orders not to let Donny talk to me.
Q. But you must have suspected that the sheriff would be one of those who was concerned about that, would you not?
A. No. Now, Mr. Hansen, I was careful not to suspect anyone because I was in the position not to put any false charges on anyone else. Having had false charges placed on me, I wasn’t about to accuse anyone. All it would take would be someone to say—
Q. But Billy is your friend, you’re talking with him and he is giving you this information that you have gotten a bad deal, and you didn’t even ask him who these people were?
A. You make it sound so innocent. I said, ‘Who did it?’ And he said that they were all in on it together but he would not tell me who did what. I did not know who did what. Donny himself — I did not know Jim Nelson had told Perry to put more charges on. I did not know that Donny Reusch kicked Perry and said, ‘You are going too far.’ I did not know that.
Q. Did you mention to your attorneys shortly after that that you had this conversation with Donny where he made these accusations?
A. What accusations?
Q. That the whole town was running you out?
A. Of course. I told them that the day that the charges were dropped.
Q. Well, that is what you suspected at that time—
A. That is what I suspected.
A. No, I said we shouted across the stations. Every time I saw Perry on the street, there was a police car right behind him. And I was told that if I were even caught near Perry I would be put back into jail.
Q. Who told you that?
A. Perry himself said — my son tried to talk to Perry, and Perry, the police put the kibosh on that.”
Id. at 26-27, 29.
The trial court did not base its holding upon a finding that Vest knew or should have known of state actors’ participation. Rather it stated he should have sued Perry Buoy and deposed him. Because it is the responsibility of the trial court to make factual findings, I agree with my colleagues that the case should be remanded. Judge Doyle would remand for an evidentiary hearing. Judge McKay agrees with the remand, but expresses the view that the district court might still be able to grant summary judgment after reconsideration. Because of the evidence recited above, I agree with Judge McKay that the district court could grant summary judgment after reconsideration. At the same time, I do not object to the trial judge taking additional evidence on the alleged cover-up and probing further on the suggestions of knowledge contained in the evidence quoted above.
McKAY, Circuit Judge, separate opinion concurring in judgment of reversal and remand:
Edwin Vest appeals from a summary judgment in a civil rights action brought pursuant to 42 U.S.C. § 1983.1 The sole issue in this appeal is whether the trial court correctly held on summary judgment that the Utah statute of limitations governing Mr. Vest’s claim was not tolled. It is clear that the trial court applied the correct *607Utah statute of limitations to this 1983 claim. It is equally clear that unless tolled under .principles established by Utah law, the suit was untimely filed. See Board of Regents v. Tomanio, 446 U.S. 478,100 S.Ct. 1790, 64 L.Ed.2d 440 (1980).
I.
Mr. Vest’s substantive claim is as follows: In early 1973, Mr. Vest was a college professor in Cedar City, Utah. The named defendants — a juvenile judge, a prosecutor, a county attorney, and a probation officer-wanted to force Mr. Vest to leave the community. To accomplish this, the defendants asked three boys on probation to testify falsely that Mr. Vest had committed forcible sodomy against them. The defendants threatened to send the boys to a state correctional school if they refused. One of the boys, Perry Buoy, agreed to collaborate after the other two refused and were sent to a state correctional school. After charges of forcible sodomy were filed against Mr. Vest, Mr. Buoy wanted to retract his complaint, but the defendants threatened to prosecute him for perjury if he did. Mr. Vest eventually pleaded guilty to a lesser charge.
Mr. Vest claims that the statute of limitations was tolled for his civil rights claim because the defendants actively concealed their participation in procuring the perjury. He asserts that after he pleaded guilty to a lesser charge, the defendants told Mr. Buoy that they would prosecute him for perjury if he told Mr. Vest who had suborned his false complaint. They placed Mr. Buoy under continuous police surveillance for five years to keep Mr. Vest from approaching him. Mr. Vest, to no avail, befriended other youths in an attempt to get them to talk to Mr. Buoy and discover the identities of the conspirators.
Finally, in 1978, the surveillance removed, Mr. Buoy told Mr. Vest that the defendants had induced his false charges. Mr. Vest alleges that this was the first time he knew that state actors were involved in the incident. He filed this action in September 1980. The applicable statute of limitations is four years.2 Thus, if the statute of limitations was tolled until 1978, his action was timely filed.
II.
The tolling of a statute of limitations is founded on equitable principles that cannot readily be formulated in bright line rules. Application of tolling principles requires substantial understanding of the general body of law applied, in this case, by the State of Utah. In a recent series of thorough opinions, the Utah Supreme Court not only has explained its precedents but also has given some indication of the principles and directions to be applied in future cases. See, e.g., Myers v. McDonald, 635 P.2d 84 (Utah 1981); Foil v. Ballinger, 601 P.2d 144 (Utah 1979); Vincent v. Salt Lake County, 583 P.2d 105 (Utah 1978).
Utah imposes a statute of limitations “ ‘to promote justice by preventing surprises through the revival of claims that have been allowed to slumber until evidence has been lost, memories have faded, and witnesses have disappeared.’ ” Myers v. McDonald, 635 P.2d 84, 86 (Utah 1981). The statute of limitations generally begins to run when the last event necessary for a cause of action occurs. Id. There are three exceptions to this general rule. First, commencement of the limitations period is post*608poned in some cases by legislation. See, e.g., Utah Code Ann. § 78-14-4 (1953). Second, the statute of limitations is tolled until the plaintiff knew or with due diligence should have known of his cause of action in “exceptional circumstances or causes of action where the application of the general rule would be irrational or unjust.” Myers, 635 P.2d at 86. Third, “where the statute of limitations would normally apply, ... proof of concealment or misleading by the defendant precludes the defendant from relying on the statute of limitations.” Id. See, e.g., Vincent, 583 P.2d at 105. Mr. Vest does not claim that any legislation tolls the statute of limitations in this case. His suit is therefore barred unless one of the other two exceptions applies.
A.
In Myers, the Utah Supreme Court recognized that in “exceptional circumstances or causes of action,” the statute of limitations is tolled until the plaintiff knew or with due diligence would have known of his cause of action. Myers, 635 P.2d 84.
Myers gives no explicit guidance on when there are “exceptional circumstances or causes of action” that trigger this exception. In Myers, an unidentified youth died in an auto accident. The news media incorrectly described him. Almost three years later, the plaintiffs identified the victim as their ward and brought a wrongful death action against the driver of the car. The court held that even absent concealment of the youth’s identity by the defendant, the two year statute of limitations was tolled if the plaintiffs had used due diligence. In explaining its decision, the court noted that the “plaintiffs could not file an action for damages or even initiate investigative efforts to determine the cause of a death of which they had no knowledge.” 635 P.2d at 87. Thus, the plaintiff’s hardship outweighed the cost of a stale claim.
The court in Myers explicitly pointed out that “[t]his is not a case where the fact of death was known but the cause of the fatal accident was not.” Id. at 87 n. 8. Thus, while Myers found “exceptional circumstances” for a plaintiff who did not know and could not reasonably have been-expected to know of his injury, the case suggests that the “exceptional circumstances” tolling principle does not always apply when a plaintiff is aware of his injury but unaware of its cause. This comports with the rationale of the “exceptional circumstances” principle, which balances two countervailing policies implicated by statutes of limitations: one against stale claims and the other against excluding plaintiffs from court. At one extreme, if á potential plaintiff knows of his cause of action, the statute of limitations provides incentive for him to sue within a reasonable time, thus avoiding the litigation of a stale claim while allowing the plaintiff access to court. At the other extreme, at least one of these two costs must be incurred when circumstances preclude the plaintiff’s knowledge of his cause of action. In Myers, the court recognized that this is the case when a potential plaintiff is unaware that he has suffered any injury. Thus, forced to choose between the two costs, the court applied the discovery rule and avoided hardship to the plaintiff but incurred the cost of hearing a stale claim.
Between these polar cases lies the case in which a potential plaintiff is aware of his injury but not of its cause. Here, the statute of limitations provides incentive for the plaintiff to investigate his injury to determine whether and whom he can sue. This can result in the avoidance of both costs— litigation of stale claims and hardship to plaintiffs — implicated by statutes of limitations. Of course, if the plaintiff’s injury is such that he is unlikely to investigate or his investigation is unlikely to reveal its cause, then his knowledge of the injury is irrelevant. Thus I conclude that under Myers, the “exceptional circumstances” tolling principle does not apply when the plaintiff is aware that he has been harmed unless there are “exceptional circumstances” or he has an “exceptional cause of action” that would cause him not to investigate the cause of his injury or that would hinder the investigation. This interpretation furthers *609the policy elucidated in Myers of minimizing both the litigation of stale claims and the exclusion of deserving plaintiffs from court.3
Applying this analysis to the present case, I note that Mr. Vest has alleged that he knew that he had been harmed when the false charges were filed against him, but he did not know the cause of his harm or whether it constituted a legal injury under federal law. However, he did know that somebody had caused Mr. Buoy to bring the false charges. I believe that a reasonable plaintiff would investigate such a case to find out who had maliciously prosecuted him. Furthermore, besides the defendants’ active concealment of their identities treated below, see post pp. 609-611, Mr. Vest has alleged no “exceptional circumstances” that would hinder his investigation of the cause of the false charges. I therefore conclude that the “exceptional circumstances” doctrine does not toll the statute of limitations for his cause of action under section 1983.
B.
Mr. Vest argues that the statute of limitations was tolled under the remaining Myers exception, the concealment doctrine, which applies when a defendant conceals the existence of a cause of action from the plaintiff. McKee v. Industrial Commission, 115 Utah 550, 206 P.2d 715 (1949). He contends that the defendants, in hiding their identities, concealed the existence of his federal cause of action. As discussed abovfc, it is clear that Mr. Vest knew in 1973 that he had a cause of action under Utah law against Mr. Buoy for malicious prosecution. He alleges, however, that since he did not know that state actors had participated in the malicious prosecution, he did not know that he had been deprived of his fourteenth amendment rights, and that he had a federal cause of action under section 1983, until December 1978.
The defendants make two counterarguments. First, they claim the concealment doctrine should not apply because they concealed only their identity from Mr. Vest, who knew he had a cause of action in 1973. The trial court based its decision on this argument:
Vest knew in 1973 of Buoy’s alleged falsehoods, and could easily have commenced an obviously actionable claim against Buoy, and then utilized the compulsary [sic] processes of judicial discovery to uncover the details of the transactions leading to his prosecution.... [T]he plaintiff could have then listed the conspirators that he suspected as “John Does” as easily as he has done in his complaint herein, substituting their true identities as information developed through the discovery process.
Record, vol. 1, at 92 (footnote omitted). Indeed, courts that have considered the issue have held that concealment of the identity of the perpetrators of a known injury, as opposed to concealment of the cause of action, does not toll the running of the limitations period. E.g., Estate of Chap*610pelle v. Sanders, 442 A.2d 157 (D.C.App. 1982). While I believe that Utah probably will adopt the rule followed in Chappelle if the issue arises, I think the argument inapposite. The defendants’ identities perform a dual function in this case. In one sense, they are mere parties in a known potential state cause of action; in another, their identity as state actors is a jurisdictional fact necessary for the existence of a. 1983 cause of action. Thus, Mr. Vest alleges that in actively concealing their identities as state actors, the defendants actively concealed a fact necessary for the existence of his federal cause of action. If this is true, that they simultaneously hid their identities as potential defendants in a known state malicious prosecution action does not render the federal cause of action any less concealed.
Moreover, application to this case of the rule followed in Chappelle would be inconsistent with the existence of section 1983 as an independent remedy. The rule’s effect would be to require a plaintiff to file a state John Doe action before bringing his 1983 suit whenever the state actors actively conceal their involvement in the wrongdoing. This would be inconsistent with the well-settled rule that “the very independence of § 1983” precludes a requirement that a 1983 plaintiff exhaust state judicial remedies. Board of Regents v. Tomanio, 446 U.S. 478, 491, 100 S.Ct. 1790,1798, 64 L.Ed.2d 440 (1980); See Monroe v. Pape, 365 U.S. 167, 81 S.Ct. 473, 5 L.Ed.2d 492 (1961). It would be perverse to allow state defendants to circumvent the independence of section 1983 by further aggravating their initial transgression by concealment. Thus, the rule followed in Chappelle does not preclude application of the concealment doctrine to this case.
The defendants also suggest that the concealment exception requires concealment of an “injury,” not concealment of a cause of action, and that even if they concealed Mr. Vest’s federal cause of action, they did not conceal his injury, so that the statute of limitations was not tolled.4 This argument, in addition to contradicting the explicit language in McKee, 206 P.2d 715, is inconsistent with Vincent v. Salt Lake County, 583 P.2d 105 (Utah 1978). In Vincent, the plaintiffs knew that leaking water had made their garage wall crack. The defendant assured them that the water was not from its pipe. The court held that the limitations period began to run only when the plaintiffs discovered that the defendant’s pipe caused the damage because “it is incongruous to require plaintiffs to commence an action ... when the cause of the damage is unknown to plaintiffs” and the defendants have misled them. 583 P.2d at 107. In Vincent, the plaintiffs were aware of their injury, but not of their cause of action, and the court applied the concealment doctrine.5 I am therefore unconvinced by the defendants’ argument that the concealment doctrine requires concealment of an injury rather than of a cause of action. This conclusion is consistent with my interpretation of the “exceptional circumstances” tolling doctrine in Myers. Although knowledge of his injury might cause a plaintiff to investigate its underlying circumstances, the defendant’s concealment of the cause of action, if successful, will render the plaintiff’s investigation unsuccessful, and the courts must either hear a stale claim or deny the plaintiff access to court. Since the necessity of incurring one of these costs is attributable to the defendant’s misbehavior, the concealment doctrine forces the defendant to bear it by precluding his invocation of the statute of limitations. See Myers, 635 P.2d at 86. Thus, the concealment doctrine applies even when the *611plaintiff is aware of his injury if the defendants have actively concealed his cause of action.
Under Utah law, when the. concealment doctrine applies, the limitations period begins to run only when the plaintiff has actual knowledge of the facts that constitute his cause of action. Vincent, 583 P.2d 105; Myers, 635 P.2d 84.6 I therefore conclude that if the defendants actively concealed the presence of all state actors from Mr. Vest, thus concealing the existence of his federal cause of action, the statute of limitations was tolled until Mr. Vest had actual knowledge of the involvement of at least one state actor. Of course, once the presence of one state actor was known, the rule followed in Chappelle would be applicable to the other defendants.
In conclusion, I believe that the “exceptional circumstances” tolling principle does not apply to this case. However, if the defendants actively concealed their participation in Mr. Vest’s injury, the concealment doctrine applies, and the limitations period began when Mr. Vest had actual knowledge of the involvement of at least one state actor. I make no judgment on whether the defendants concealed facts, and I would not preclude the possibility that the trial court may find it proper to grant summary judgment on the limitations issue after reconsideration in light of this court’s judgment.
. Section 1983 provides in part as follows:
Every person who, under color of any statute, ordinance, regulation, custom, or usage, of any State or Territory or the District of Columbia, 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.
42 U.S.C. § 1983 (Supp. IV 1980).
. In suits brought under § 1983, state law supplies the statute of limitations and governs its tolling so long as it is consistent with federal law. Board of Regents v. Tomanio, 446 U.S. 478, 100 S.Ct. 1790, 64 L.Ed.2d 440 (1980). The applicable state statute is the one governing the state cause of action most closely analogous to the § 1983 claim. Spiegel v. School Dist. No. 1, Laramie County, 600 F.2d 264 (10th Cir.1979). I believe that the district court was correct in rejecting Mr. Vest’s argument that the most analogous state action was for fraud and in finding that the applicable limitations period is four years under Utah Code Ann. § 78-12-25(2) (1953). I note, however, that the limitations period for the suit against the sheriff might be only two years. Utah Code Ann. § 78-12-28(1) (1953). Since Mr. Vest claims first to have been aware of the presence of state actors in December 1978, and filed this action in October 1980, § 78-12-28(1) does not affect the outcome of this appeal.
. As stated above, the tolling of statutes of limitations does not lend itself to bright line rules. The crux of the issue is whether a duly diligent plaintiff is likely to find out that he can sue before the statute of limitations expires. There might be cases in which a plaintiff is aware of his injury but, due to exceptional circumstances, is precluded from discovering the existence of his cause of action. In such a case, the rationale of Myers requires that the limitations period be tolled. One example is when a defendant actively conceals a plaintiffs cause of action without concealing his injury. See post pp. 609-611. Another such area is medical malpractice suits, in which Utah Code Ann. § 78-14-4 (1953), as interpreted by the Utah Supreme Court, tolls the statute of limitations even if the plaintiff knows that he has been hurt but is not aware of the cause of his injury. Foil v. Ballinger, 601 P.2d 144 (Utah 1979). This is because of the great disparity in knowledge between the providers and recipients of health care with respect to side effects and after effects of medical treatment. Id. In terms of the present opinion’s analysis, the plaintiff’s investigation will be unsuccessful, and society must incur one of the two statute of limitations costs, because “[wjhile the recipient may be aware of a disability ... there may be, to the untutored understanding of the average layman, no apparent connection between the treatment provided by a physician and the injury suffered.” Id. at 147.
. Formally, of course, the defendants are alleged to have concealed Mr. Vest’s injury — a deprivation of his fourteenth amendment rights — and not just his § 1983 remedy, through their concealment of their identities as state actors.
. Vincent is superficially distinguishable from the instant case because Mr. Vest at least knew that he could sue Mr. Buoy. To rely on this distinction is to reassert the defendants’ first argument, which I rejected above.
. In Myers, the plaintiffs alleged that the defendant had concealed their wrongful death action. They claimed to have used due diligence to discover the facts. The court held that even if the plaintiffs did not use due diligence, their suit was timely if they could show concealment by the defendant. 635 P.2d at 87.