Jessie Haynes appeals from the summary denial of his pro se petition for post conviction relief pursuant to Indiana Rules of Procedure, Post Conviction Rule 1. The petition was filed to challenge the validity of a guilty plea entered in July 1970 to a charge of theft.
The transcript of the guilty plea proceeding discloses that Haynes’ attorney told the court he had “gone into the subject” of Haynes’ constitutional rights with him. Then the following colloquy occurred between the judge and Haynes:
“THE COURT: Mr. Eichelberg said he had explained to you all of your constitutional rights at the trial.
DEFENDANT: Yes.
THE COURT: Did you fully understand them?
DEFENDANT: Yes.
THE COURT: Your right to a trial by jury and your right to face your accu-sors. Do you understand those things?
DEFENDANT: Yes.
THE COURT: There is no question about any of your rights?
DEFENDANT: No.”
Although there was other discussion, the foregoing constitutes the entire record concerning Haynes’ understanding and waiver of his constitutional rights. It was clearly insufficient to comply with the mandate of Boykin v. Alabama (1969), 395 U.S. 238, 89 S.Ct. 1709, 23 L.Ed.2d 274 since no mention was made of Haynes’ right against self incrimination. See also Goode v. State (1974), 160 Ind.App. 360, 312 N.E.2d 109.
Following acceptance of the guilty plea Haynes was given a suspended sentence of one to five years and was placed on probation. Approximately fifteen months later upon the recommendation of the probation department Haynes was discharged from probation. The fact that he thereby completed service of the sentence did not, however, render the matter moot. Rader v. State (1979), Ind.App., 393 N.E.2d 199. Moreover, PC 1 imposes no time limitation for seeking relief under its auspices. Langley; Richardson v. State (1971), 256 Ind. 199, 267 N.E.2d 538.
In the present case the trial court took judicial notice of a criminal charge for possession of marijuana lodged against Haynes on October 25, 1979 which also charges Haynes with being an habitual offender. [IC 35-50-2 -8]. The court noted that one of the felonies relied upon by the state was the theft conviction with which we are concerned, and that Haynes had been convicted as an habitual offender and was sentenced on March 6, 1980.1 The court then held that because Haynes failed to present his challenge to the theft conviction prior to the March 6 sentencing, although he was aware the state was relying upon it, he was estopped from attempting to set the conviction aside.
There is, of course, no issue before us concerning Haynes’ status as an habitual offender or of his ability to attack that judgment should he succeed in his present claim. It is worthy to note, however, that due process requires that a person charged with being an habitual offender must be afforded the right to challenge the constitutional validity of the prior convictions upon the basis of which the state seeks to impose an enhanced penalty.2 Burgett v. State of Texas (1967), 389 U.S. 109, 88 S.Ct. 258, 19 L.Ed.2d 319. Our Supreme Court has acknowledged the right in Hall v. State (1980), Ind., 405 N.E.2d 530 and Collins v. *876State (1981), Ind., 415 N.E.2d 46, cert. denied 451 U.S. 991, 101 S.Ct. 2331, 68 L.Ed.2d 851.
Nevertheless there is presently confusion in the case law as to precisely how such a challenge should be made. In State v. Dossett (1977), 174 Ind.App. 501, 368 N.E.2d 259 the First District concluded that while the defendant could attack the constitutional validity of a prior guilty plea, the conviction was merely voidable and therefore to challenge the conviction in an habitual offender proceeding amounted to an impermissible collateral attack on the prior judgment.
Subsequently in Hall and Collins, supra, our Supreme Court, in ruling that the accused had the burden of producing evidence of the invalidity of a prior guilty plea, assumed that it was permissible to challenge the prior conviction in the habitual offender proceeding.
Most recently in Williams v. State (1982), Ind., 431 N.E.2d 793, the court held that the trial judge acted within his province in denying a continuance to investigate the prior convictions asserted in an habitual offender count added to the charge a week before the trial because the trial at hand was “not the proper forum to contest the legality of those sentences by way of collateral attack.” 431 N.E.2d at 795. It does not appear, however, that either of the prior convictions in Williams was asserted to be constitutionally invalid and we may infer from the language of the opinion that this was not the case.3
While we believe there is great practical utility in permitting one charged as an habitual offender to challenge the constitutional invalidity of any of the convictions relied upon by the state in the habitual offender proceeding,4 we are unprepared to say that his failure to do so bars him from thereafter challenging one of the prior convictions relied upon. Compare United States v. Tucker (1972), 404 U.S. 443, 92 S.Ct. 589, 30 L.Ed.2d 592. Bader, supra, holds that the conviction is a continuing injury per se. 393 N.E.2d 201.
Despite lack of mootness our courts have held that a convicted person who unreasonably delays in seeking relief may be subject to an affirmative defense by the state in the nature of laches and equitable estoppel when he attempts to initiate a PC 1 proceeding. Frazier v. State (1975), 263 Ind. 614, 335 N.E.2d 623; Langley; Richardson v. State (1971), 256 Ind. 199, 267 N.E.2d 538. When this question is raised by the state it is to be determined from all the facts and circumstances of the particular case, including the reasonableness of the delay, and the prejudice, if any, to the adversary.5 Frazier, supra; Stutzman v. State (1981), Ind.App., 427 N.E.2d 724. Accordingly, the court should conduct an evi-dentiary hearing on the question of laches and estoppel. The failure to do so requires us to remand. Frazier, supra; Stutzman, supra.
It was error for the court to summarily deny the petition.
Reversed and remanded for further proceedings consistent herewith.
HOFFMAN, P. J., dissents and files separate opinion. STATON, J., concurs and files separate opinion.. Subsequently affirmed on appeal in Haynes v. State (1982), Ind., 431 N.E.2d 83.
. Prosecuting officials intending to rely upon guilty pleas entered in the post -Boykin era but prior to the application of IC 35-4.1-1-3 (1969-1974) for habitual offender enhancements would be well served to ascertain the validity of the guilty plea proceedings in question before proceeding to trial since in those days faulty proceedings were not uncommon, especially where a suspended sentence was in prospect for the accused.
. The court introduced this portion of the decision by observing that “[t]he issues of a defendant’s guilt or innocence of prior crimes .. .. ” were not before the trial court in the habitual offender proceeding. 431 N.E.2d at 795. (emphasis added)
. We agree with the analysis in State v. Dos-sett that the conviction is voidable rather than void, and believe that the majority misspoke itself in Burgett when at 389 U.S. 114, 88 S.Ct. 261 it referred to an infirm conviction as void. On the other hand, because of the peculiar nature of the doctrine of fundamental error an accused should be able to attack a constitutionally voidable judgment in the habitual offender proceeding where the state is relying upon its validity to enhance a penalty.
.It should be noted that prior to October 1, 1977, the theft conviction would not have served as a basis for an habitual offender proceeding since under the prior law only felonies for which a person had been imprisoned were considered. IC 35-8-8-1, 2 [repealed]. Also, there would appear to be no prejudice to the state since Haynes completed service of the penalty imposed for the offense.