I.
Our original opinion in this case,
Escobe-do v. Estelle,
We fail to see any connection between this fact and the question of whether Esco-bedo exhausted his state remedies with respect to the 1970 conviction. As we noted in our original opinion,
The State takes issue with our conclusion,
II.
The reversal of Escobedo’s 1977 conviction does, however, raise a substantial jurisdictional issue that was not presented by the facts addressed in our original opinion, and that, once again, we are required to consider
sua sponte.
While cases such as
Sibron v. New York,
Other precedent provides only a partial answer to that question. At the time Escobedo filed his federal habeas corpus petition, his incarceration under the 1977 conviction may well have been sufficient to satisfy the “in custody” requirement, notwithstanding the fact that he had already completed his sentence for the 1970 conviction. We held in
Sinclair v. Blackburn,
Now, however, Escobedo is no longer in custody pursuant to the 1977 conviction. Because the 1977 conviction and accompanying life sentence have been reversed by the Texas Court of Criminal Appeals, Escobedo’s status with regard to the charges which underlaid that conviction is now that of a pretrial detainee. Had this been his status at the time he filed his federal habeas petition, he clearly could not have met the “in custody” requirement. The question now becomes whether we possess statutory jurisdiction simply because Escobedo may have satisfied the “in custody” requirement — albeit indirectly, and only through the relationship between the challenged 1970 conviction and the enhanced sentence for the 1977 conviction — at the time he filed his federal habeas petition.
Consistently with the
Sibron
line of cases, the Supreme Court held in
Carafas v.
La-
Vallee,
We have frequently applied the Carafas rule to habeas cases in which the challenged conviction was the same conviction pursuant to which the petitioner was incarcerat *616 ed when he filed his petition in the district court. 6 The question presented by the case at bar, however, appears to be one of first impression. Essentially, it is this: may the rules of Sinclair v. Blackburn and Carafas be combined? That is, does a habeas petitioner satisfy the statutory “in custody” requirement when (1) he is no longer in custody pursuant to the conviction he attacks, and (2) he is no longer in custody pursuant to a conviction positively and demonstrably related to the conviction he attacks, although he was so in custody at the time he filed his petition? Despite broad language in Carafas and its progeny that might support such a holding, 7 we think that the rules of Carafas and Sinclair v. Blackburn cannot be so combined.
We note first that Escobedo does not fall within the literal language of the
Sinclair
rule: while he might still be able to demonstrate the existence of collateral consequences sufficient to keep his attack on the 1970 conviction from being declared moot, he clearly cannot demonstrate the key collateral consequence necessary to sustain federal habeas corpus jurisdiction — “a positive, demonstrable relationship between the prior conviction and the petitioner’s
present
incarceration,”
Sinclair,
By contrast, Escobedo’s present incarceration is neither in form nor substance related to his 1970 conviction. Further, even any future connection between his incarceration and the 1970 conviction is purely speculative, given that at his new trial on the charges that underlaid the 1977 conviction, the state prosecutor may decide not to use the 1970 conviction for enhancement purposes. 8 Indeed, Escobedo may be acquitted altogether upon his retrial. 9 Finally, we must keep in mind the Supreme Court’s admonition that
[t]he custody requirement of the habeas corpus statute is designed to preserve the writ of habeas corpus as a remedy for severe restraints on individual liberty. Since habeas corpus is an extraordinary remedy whose operation is to a large extent uninhibited by traditional rules of finality and federalism, its use has been limited to cases of special urgency, leaving more conventional remedies for cases in which the restraints on liberty are neither severe nor immediate.
Hensley,
III.
The petition for rehearing filed in the above-entitled and numbered cause is GRANTED. The judgment of the district court, which dismissed Escobedo’s habeas petition without prejudice, is AFFIRMED.
SO ORDERED.
Notes
. Mootness and the “in custody” requirement are distinct inquiries. See note 5 infra.
. The primary statutory source of the federal courts’ habeas corpus power provides in pertinent part as follows:
(c) The writ of habeas corpus shall not extend to a prisoner unless—
(3) He is in custody in violation of the Constitution or laws or treaties of the United States; ....
28 U.S.C. § 2241 (1976) (emphasis added).
Also relevant is 28 U.S.C. § 2254(a) (1976), which provides that the federal courts “shall entertain an application for a writ of habeas corpus in behalf of a person in custody pursuant to the judgment of a State court only on the ground that he is in custody in violation of the Constitution or laws or treaties of the United States.” (Emphasis added.) See also 28 U.S.C. §§ 2242, 2243, 2244, 2245, 2249, 2252 (1976) (all referring to “custody” or “detention”).
. See
also Brown v. Wainwright,
. The State suggests that we should remand the case to the district court in order for Esco-bedo to make such a showing. The State contends that since Escobedo’s trial counsel in his 1977 trial did not object to the use for enhancement purposes of the allegedly void 1970 conviction, there is no “positive, demonstrable relationship” between the 1970 conviction and the 1977 conviction pursuant to which Escobe-do was incarcerated when he filed his suit: according to the State, the doctrine of
Wainwright v. Sykes,
. While both the mootness doctrine and the “in custody” requirement relate to the federal courts’ subject-matter jurisdiction, the former, of course, derives from the “case or controversy” language of art. Ill, § 2 of the Constitution, while the latter is a statutory prerequisite for the exercise of the habeas jurisdiction conferred upon us by Congress.
Courts have occasionally framed in “mootness” terms what in reality have been decisions that particular habeas petitioners could not satisfy the “in custody” requirement.
See, e. g., Maggard v. Florida Parole Comm’n,
.
E.g., Farmer v. Strickland,
.
E.g„ Davis v. Page,
. As we understand Texas law, it affords state prosecutors discretion whether to allege prior convictions for enhancement purposes.
See
Tex. Penal Code Ann. § 12.42 (Vernon 1974);
Mays v. Estelle,
. We express no opinion as to whether Texas law on res judicata and related doctrines would bar Escobedo from urging anew, in his retrial and in any state-court appeals therefrom, that his 1970 conviction was void and hence cannot be used for enhancement purposes. As an initial matter, at least, state law governs whether any res judicata consequences attend the Texas Court of Criminal Appeals’ denial of his state-court habeas petition.
. Accordingly, we do not address the State’s suggestion, raised for the first time in its petition for rehearing, that because of the indirect effects Escobedo’s federal habeas attack on his 1970 conviction might have on the pending state-court proceedings, his suit should be barred under the nonjurisdictional doctrine of
Younger v. Harris,
