This is a diversity suit for legal malpractice, and at once we confront an issue of federal subject-matter jurisdiction. The plaintiffs jurisdictional statement, in violation of 7th Cir. R. 28(a)(1), does not indicate the state of citizenship of either the plaintiff or the defendants, who compound the error in their jurisdictional statement by failing both to point out the error and to supply the missing information. From the record it is apparent that the plaintiff is a citizen of Minnesota and the individual defendant a citizen of Wisconsin; but what of the law-firm defendant? The name of the firm is followed by “S.C.,” and while its counsel informed us that this means “service corporation” and that the firm is incorporated and has its principal place of business in Wisconsin, he confessed to being unacquainted with the nature of a Wisconsin service corporation either generally or in reference to its status for purposes of the diversity jurisdiction. If the service corporation is assimilated to a regular business corporation, then jurisdiction is of course secure; but if it is assimilated to a partnership, including a limited partnership, or to an L.L.C. (limited-liability company), the existence of diversity would depend on the citizenship of the partners,
Carden v. Arkoma Associates,
The answer is given by our decision in
Cote v. Wadel,
Cote was a “first generation” professional-corporation case. The original impetus for the formation of professional corporations was to obtain tax benefits, not to limit liability. Even today, some professional-corporation statutes do not limit the personal liability of the principals of such a corporation, corresponding to partners in the traditional law-firm partnership. But many do. (See the useful discussions in Christopher C. Wang, “Breaking Up Is Hard to Do: Allocation of Fees From the Unfinished Business of a Professional Corporation,” 64 U. Chi. L. Rev. 1367 (1997), and Debra L. Thill, “The Inherent Powers Doctrine and Regulation of the Practice of Law: Will Minnesota Attorneys Practicing in Professional Corporations or Limited Liability Companies Be Denied the Benefit of Statutory Liability Shields?” 20 Wm. Mitchell L. Rev. 1143 (1994).) Wisconsin’s service-corporation statute is one of them. It protects the shareholders of such a corporation from vicarious liability for the negligence or other misconduct either of the corporation itself or of the other shareholders. Wis.Stat. § 180.1915. The statute does not shield the lawyer or other professional from unlimited liability for acts of the corporation in which he is personally complicit; and that means that if a lawyer practicing by himself incorporates as a service corporation, he obtains no limitation of his personal liability at all. But that is equally true of the limited liability of shareholders of ordinary business corporations: they are not insulated from unlimited personal liability for acts on behalf of the corporation for which they could be sued personally.
There is thus no tension with
National Ass’n of Realtors v. National Real Estate Ass’n, Inc., supra,
Any tension between Cote and later cases derives not from National Ass’n of Realtors v. National Real Estate Ass’n but from the limited partnership and L.L.C. cases, since, functionally, they are even closer to standard business corporations than are professional (or service) corporations yet they are treated as ordinary partnerships for purposes of determining whether there is diversity jurisdiction. But as neither party has asked us to reexamine Cote, and no case has questioned its rule, and the Wisconsin service-corporation goes far to assimilate professional to stan *1013 dard business corporations, we shall adhere to the rule of that case at least for now.
On the merits, the district judge granted summary judgment for the defendants on the ground that Wisconsin’s six-year statute of limitations for legal malpractice, Wis.Stat. § 893.53, had run. In January of 1990, the plaintiff, Saecker, represented by the individual defendant, Thorie (a member of the defendant firm), had been convicted in a Wisconsin state court of rape and other crimes and sentenced to 15 years in prison. Saecker’s family had wanted DNA testing of bodily fluids and hair found on the victim of the rape, but Thorie had advised against this on the erroneous ground that the results of DNA testing would not be admissible at Saecker’s trial. Saecker’s appellate remedies were exhausted on April 2, 1991, but in subsequent postconviction proceedings in which he was represented by new counsel he successfully moved for the DNA testing, which exonerated him. In October of 1996, after a new trial was ordered, all charges against him were dropped. He brought this suit in May of 1999. The district court ruled that the statute of limitations had begun to run on April 2, 1991, when the Wisconsin Supreme Court denied Saecker’s petition to review the affirmance of his conviction, and so expired before he brought his suit.
Under Wisconsin law a statute of limitations begins to run when the plaintiff discovers or should have discovered both his injury and the person who, and the act that, were the probable cause of the injury. See
Borello v. U.S. Oil Co.,
The parties agree that the date of injury was April 2, 1991, and in view of their agreement we need not speculate on alternative possibilities, such as the date of his conviction. Cf.
Smith v. Herding, Myse, Sivain & Dyer, Ltd., supra,
Though not mentioned by the parties, the Wisconsin courts might hold that the statute of limitations was tolled until October 1996, when the state finally dropped all charges against Saecker. In most states, including Wisconsin, a legal malpractice suit against a criminal defense attorney requires a showing that the criminal defendant (that is, the malpractice plaintiff) actually was innocent, implying acquittal and more — that the defendant really was innocent and wasn’t just acquitted because the state could not carry its heavy
*1014
burden of proof. E.g.,
Harris v. Bowe,
Until October 1996, Saecker’s innocence had not been determined. But if therefore the running of the statute of limitations was tolled until then, this would not help him. The doctrine of equitable tolling, the doctrine that is applicable when a plaintiff seeks tolling for reasons other than acts by the defendant that prevented him from suing earlier, requires the plaintiff to sue as early as he can after expiration of the statute of limitations. E.g.,
Elmore v. Henderson,
The suit is also barred by the doctrine of judicial estoppel, which forbids a party who has prevailed in one suit to repudiate the ground on which he prevailed in order to win a subsequent suit. E.g.,
United States v. Hook,
This conclusion is in tension, however, with 28 U.S.C. § 1738, as interpreted by the Supreme Court in
Marrese v. American Academy of Orthopaedic Surgeons,
We need not try to resolve the tension in that case. Wisconsin has a doctrine of judicial estoppel, and it is identical to the federal doctrine. See
State v. Petty, supra,
*1015 When Saecker, having in postconviction proceedings obtained the DNA test results, moved for a new trial on the basis of newly discovered evidence, he had to show that the evidence had not been available to him at trial. Part of the explanation that he offered, embracing Thorie’s unsound advice, was that DNA evidence was believed to be inadmissible — which if true would eliminate the basis for his malpractice claim. The Wisconsin courts that adjudicated his motion for a new trial duly held that DNA testing had been such a novelty in 1990 that Saecker, and so by implication Thorie, could not be faulted for not having moved for such testing. This ruling is inconsistent with the malpractice claim, which Saecker could have preserved only by arguing in the postconviction proceedings that his failure to move for DNA testing at trial was due not to DNA evidence being inadmissible but rather to ineffective assistance by his trial counsel.
Affirmed.
