Dolliver, J. —
In October of 1986, this court affirmed Benjamin Harris' aggravated first degree murder conviction and death sentence. State v. Harris, 106 Wn.2d 784, 725 P.2d 975 (1986), cert. denied, 480 U.S. 940 (1987). In the present 326-page personal restraint petition, Mr. Harris challenges his death sentence and the jury's finding as to the aggravating factor. He frames some 36 issues, many of which are facial or as-applied challenges to this state's death penalty statute. (See appendix.)
This court considered each of these issues en banc at an administrative conference. See RAP 16.11(b), (c). The court has also reviewed the trial transcript. Based on the arguments presented and the record before us, we find no reason to reconsider the issues raised and decided on direct appeal (see In re Taylor, 105 Wn.2d 683, 687, 717 P.2d 755 (1986)) and no basis on which to grant relief on any of the issues not previously raised. See In re Jeffries, 110 Wn.2d 326, 752 P.2d 1338 (1988). Two issues warrant discussion, however.
First, petitioner challenges the death penalty charging policy of the Pierce County Prosecuting Attorney's Office. The record indicates that the prosecutor files a notice of intent to seek the death penalty in every aggravated first degree murder case unless the defendant or his attorney brings evidence of mitigating circumstances to the State's attention. Petitioner would liken this policy to the one we [693]*693found invalid in State v. Pettitt, 93 Wn.2d 288, 295, 609 P.2d 1364 (1980); see also State v. Rowe, 93 Wn.2d 277, 609 P.2d 1348 (1980); State v. Gilcrist, 91 Wn.2d 603, 590 P.2d 809 (1979); State v. Lee, 87 Wn.2d 932, 558 P.2d 236 (1976).
The prosecutor in Pettitt had an automatic policy of filing habitual criminal charges against all defendants with three or more prior felonies. He testified he "could imagine no situation which would provide for an exception to the mandatory policy." State v. Pettitt, supra at 296. The Pierce County Prosecuting Attorney, by contrast, will consider any mitigating factors the defendant brings to his attention. The availability of this "escape valve" makes the Pierce County policy more akin to the habitual criminal charging policy we upheld in Rowe than to the inflexible, absolute policy challenged in Pettitt. In Rowe, one of the prosecutor's written charging standards provided that a habitual criminal charge would be made "in all cases" in which the defendant was charged with a "high impact" crime and had two valid prior convictions. See State v. Rowe, supra at 281. The standards also contained a section which allowed for exceptions to all charging criteria, however, where "special factors" required leniency. State v. Rowe, supra at 282. This kind of "individualized tempering" of an otherwise absolute charging policy is also present here.
There is, moreover, a significant distinction between the death penalty charging decision at issue here and the decision whether to file habitual criminal charges. Pertinent factors the prosecutor may consider in making the latter decision include the nature of the defendant's present and prior convictions, the amount of time between them, and the State's ability to prove the existence and validity of the prior convictions. State v. Lee, supra at 935; State v. Nixon, 10 Wn. App. 355, 356-57, 517 P.2d 212 (1973). These are, in the main, matters of public record to which the prosecutor has ready access.
[694]*694A prosecutor who charges a defendant with aggravated first degree murder, by contrast, must make the more subjective determination of whether there is "reason to believe that there are not sufficient mitigating circumstances to merit leniency." RCW 10.95.040; see also State v. Campbell, 103 Wn.2d 1, 25, 691 P.2d 929 (1984), cert. denied, 471 U.S. 1094 (1985). Although some statutory mitigating factors involve objective facts the prosecutor can readily ascertain (see, e.g., RCW 10.95.070(1) (lack of criminal history)), most are in the nature of explanations or excuses related to the crime itself. RCW 10.95.070(2) (extreme mental disturbance), (3) (consent of victim), (4) (minor participation as an accomplice), (5) (duress), and (6) (mentally impaired capacity). As with criminal defenses generally, these tend to be matters about which the defendant and his attorney will have more knowledge than the State. Additionally, although the State will at trial bear the burden of proving there are insufficient mitigating circumstances to merit leniency, State v. Rupe, 101 Wn.2d 664, 701, 683 P.2d 571 (1984), it cannot attempt to rebut on any particular point unless the defendant first presents evidence on it. State v. Bartholomew, 101 Wn.2d 631, 642-43, 683 P.2d 1079 (1984). The Pierce County charging policy makes sense in light of this evidentiary principle.
Nothing in this court's decision in Pettitt condemns a charging policy which allows for exceptions and is based on applicable statutory and evidentiary criteria. See State v. Rowe, supra at 282-87; see also 2 W. LaFave & J. Israel, Criminal Procedure § 13.2(d), at 176 (1984) (discussing Pettitt and Rowe).
Petitioner also claims the prosecutor, by filing a death notice, penalized him for exercising his right to remain silent. See Wayte v. United States, 470 U.S. 598, 608, 84 L. Ed. 2d 547, 105 S. Ct. 1524 (1985) (decision to prosecute cannot be based on defendant's exercise of constitutionally protected rights). We disagree. In terms of its effect on a defendant's privilege against self-incrimination, Pierce County's policy of relying on the defendant for information [695]*695regarding mitigating factors is quite similar in effect to CrR 4.7(b). Under this rule, the trial court may order the defendant to inform the prosecutor of the general nature of the defense and to specify whether certain defenses or issues will be raised. CrR 4.7(b)(2)(xii)-(xiv). Where, as in this jurisdiction, the defendant has a reciprocal right of discovery, requiring him to reveal these matters prior to trial does not violate his privilege against self-incrimination. Williams v. Florida, 399 U.S. 78, 26 L. Ed. 2d 446, 90 S. Ct. 1893 (1970); see also Wardius v. Oregon, 412 U.S. 470, 37 L. Ed. 2d 82, 93 S. Ct. 2208 (1973) (notice of alibi rule violates due process if defendant has no reciprocal discovery rights). As the Supreme Court observed in upholding Florida's "notice of alibi" rule:
[T]he pressures that bear on [the defendant's] pretrial decision are of the same nature as those that would induce him to call alibi witnesses at the trial: the force of historical fact beyond both his and the State's control and the strength of the State's case built on these facts. Response to that kind of pressure by offering evidence or testimony is not compelled self-incrimination transgressing the Fifth and Fourteenth Amendments.
Williams v. Florida, supra at 85. Although the decision whether to seek the death penalty occurs earlier in the process than does discovery, this fact does not make the required disclosures any the more "compelled." See also Bordenkircher v. Hayes, 434 U.S. 357, 54 L. Ed. 2d 604, 98 S. Ct. 663 (1978) (prosecutorial threat to file additional charges unless defendant pleads guilty does not violate privilege against self-incrimination).
For all of these reasons, petitioner has not shown that the charging policy infringed upon any of his constitutional rights.
The second claim meriting discussion involves the admission of petitioner's 1969 manslaughter conviction in the penalty phase of trial. Prior convictions are admissible as nonstatutory aggravating factors. State v. Bartholomew, 101 Wn.2d 631, 640-41, 683 P.2d 1079 (1984). Petitioner [696]*696claims, however, that the State must prove every aspect of the constitutional validity of any prior guilty plea, including specifically that (1) the defendant was aware of all of his constitutional rights, (2) he received "real notice" of the charge, and (3) the plea court obtained an adequate factual basis for the plea. Petition, at 21-31. Petitioner would impose this burden regardless of whether the defendant challenges the plea either during the capital sentencing hearing or on direct appeal, and, apparently, even if he fails at any time to assert ignorance of his rights. Relying on such an absolute proof requirement, petitioner characterizes his 1969 conviction as "facially unconstitutional on the record." Petition, at 24.
In rejecting this claim, we emphasize three points. First, the prior conviction was not an "element" the State had to prove in order to impose the death penalty, but rather one piece of evidence in the State's entire penalty phase case. See RCW 10.95.020; State v. Bartholomew, supra. Petitioner's challenge thus is not to the sufficiency of the State's case, but to the admissibility of a particular item of evidence. The analogies both parties make to habitual criminal proceedings are therefore imprecise at best. See State v. Hennings, 100 Wn.2d 379, 670 P.2d 256 (1983) (challenge to validity of prior convictions in habitual criminal proceeding is challenge to sufficiency of State's evidence and thus raises double jeopardy concerns).
Second, petitioner's prior conviction was counseled. This is not, therefore, a case like Burgett v. Texas, 389 U.S. 109, 19 L. Ed. 2d 319, 88 S. Ct. 258 (1967), where the prior conviction used to enhance the defendant's sentence was presumptively void under the Sixth Amendment. See Marshall v. Lonberger, 459 U.S. 422, 437, 74 L. Ed. 2d 646, 103 S. Ct. 843 (1983) (absent evidence to the contrary, counseled defendant may be presumed to have been informed of the nature of the charges).
Third, unlike Burgett, this is not a direct appeal but rather a personal restraint proceeding. A personal restraint petitioner bears the burden of proving he was prejudiced by [697]*697a constitutional error. In re Jeffries, 110 Wn.2d 326, 346, 752 P.2d 1338 (1988); In re Hews, 99 Wn.2d 80, 660 P.2d 263 (1983). A petitioner who seeks relief from a guilty-plea based conviction thus must prove the plea is in some manner constitutionally infirm. In re Hews, supra at 91. There is no reason a lesser burden should apply where, as here, the petitioner is challenging the use of a prior conviction in a subsequent trial. Accordingly, petitioner cannot rely solely on the State's asserted failure to prove the validity of the prior conviction at trial, but must instead show some infirmity in fact exists in that conviction. See Johnson v. Mississippi, __ U.S __, 100 L. Ed. 2d 575, 108 S. Ct. 1981 (1988) (where prior conviction admitted in capital sentencing proceeding is successfully challenged in postconviction proceeding, death sentence must be vacated).
Petitioner has not met this burden. The manslaughter judgment and sentence form shows he was represented in that proceeding by the same attorney who represented him at trial and on appeal in the present case. The document also says the trial court advised petitioner of the nature of the charges against him, as well as his rights to be present at trial, to be tried by a jury, to confront the witnesses against him, and to have witnesses called on his behalf at county expense.
Petitioner complains that the form does not mention the right to remain silent. Since petitioner fails even to allege ignorance of this right, however, he has not made a prima facie showing of a constitutional violation. See In re Hews, supra at 88. Nor, absent such an allegation, is the State under any obligation in this proceeding to submit evidence of petitioner's knowledge of his rights. RAP 16.9; see also State v. Chervenell, 99 Wn.2d 309, 314, 662 P.2d 836 (1983) (validity of prior convictions used to enhance sentence may be shown with extrinsic evidence).
Petitioner also complains that the 1969 judgment and sentence form does not contain the factual basis for the plea. See CrR 7.3 (describing contents of judgment); see also CrR 4.2(g) (factual basis is contained in statement of [698]*698defendant on plea of guilty). The factual basis requirement is intended to ensure that the defendant possesses an understanding of the law in relation to the facts. In re Keene, 95 Wn.2d 203, 209, 622 P.2d 360 (1980). Again, petitioner fails even to allege that he lacked such awareness. Under these circumstances, his understanding of the nature of the charge may be assumed from his representation by presumptively competent counsel. Marshall v. Lonberger, supra at 437.
To summarize, petitioner has not made a prima facie showing of constitutional error as to any of his claims. The personal restraint petition is therefore denied.
Appendix
The issues are framed in the personal restraint petition as follows:
1. The Prosecuting Attorney's interpretation, construction and application of RCW 10.95.040 in petitioner's prosecution was unconstitutional, denied petitioner rights and privileges guaranteed by the constitution of the United States and the constitution and laws of the State of Washington.
2. By informing the jury that it was not responsible for determining whether the penalty of death was the appropriate sentence, the prosecution's closing argument violated the Eighth Amendment's high standard of reliability in capital cases.
3. The trial court erred in failing to instruct the jury the death penalty should not be imposed solely to enact retribution or in a spirit of vengeance.
4. Petitioner's constitutional right to due process of law was violated when the trial court admitted evidence of his 1969 convictions of assault in the third degree and manslaughter in the special sentencing proceedings.
5. The sentence of death imposed upon petitioner must be invalidated because the jury, in the special sentencing proceeding, considered evidence of a prior conviction constitutionally invalid on its face in violation of the constitutional prohibition against constitutionally invalid convictions being used or considered in subsequent sentence enhancement proceedings.
6. Washington's capital punishment statute, and/or its application to petitioner, is unconstitutional in that it permits the consideration of prior convictions which are constitutionally invalid at the special sentencing proceeding and prohibits a defendant from contesting the constitutional validity of prior convictions offered for consideration at the [699]*699special sentencing proceeding in violation of rights guaranteed by the Fifth, Eighth and Fourteenth Amendments.
7. Petitioner's constitutional right to a fair trial and due process of law was violated when the trial court instructed the jury that they had "nothing whatever to do with the punishment to be inflicted in case of a violation of law" and that "the fact that punishment may follow conviction cannot be considered by [the jury] except insofar as it may tend to make [the jury] careful."
8. The failure to require the jury to articulate what mitigating circumstances it found, and how they were weighed against the aggravating factors, prevents meaningful appellate review of the death sentence under RCW 10.95.130. To affirm the death sentence in this case, therefore, would violate defendant's right to an appeal under Const. art. 1, § 22 (amend. 10), and his right to be free from the arbitrary and capricious infliction of capital punishment, guaranteed by the Eighth Amendment.
9. Defendant Harris' sentence of death is grossly disproportionate to codefendant's sentence. This court should vacate the death sentence pursuant to RCW 10.95.130(2) (b).
10. Petitioner was denied a fair trial, due process and rights guaranteed by the Constitution when the trial court instructed the jury in the special sentencing proceeding that it was required to consider anew all of the testimony and exhibits admitted into evidence in phase one of petitioner's trial.
11. The information report submitted to the Clerk of the Supreme Court of Washington by the trial court violated petitioner's rights to confrontation, to due process of law and to the right to counsel.
12. Petitioner's constitutional right to due process of law and equal protection of the law was violated and denied when the Supreme Court failed to perform the review of sentence required by RCW 10.95 pursuant to the terms and provisions of that statute.
13. Petitioner's constitutional right to a fair trial and due process of law under the due process and cruel punishment provisions of the federal and state constitutions were violated when the trial court instructed the jury that it would in the special sentencing proceeding admit any relevant evidence and instructed the jury that it could consider any relevant factors.
14. Petitioner was denied his constitutional right to a fair trial and due process of law by the court instructing the jury that it had nothing whatever to do with the punishment to be inflicted and by instructing the jury that throughout its deliberation it was not permitted to be influenced by sympathy.
15. Petitioner's constitutional rights were violated and denied when the trial court admitted petitioner's custodial statements in evidence without first determining whether the statement was voluntarily made after a knowing and intelligent waiver of his right to remain silent.
[700]*70016. Petitioner's constitutional right to a fair trial, due process of law and equal protection were violated and denied by the trial court when it admitted into evidence statements of petitioner, offered by the State in its case in chief which were made in connection with, and relevant to, an offer to plead guilty to a reduced charge made by petitioner.
17. Petitioner's constitutional right to be present at every stage of his trial, to a fair trial, to due process of law, and to confront the witnesses against him was violated and denied.
18. Petitioner's right to confront witnesses against him, to not incriminate himself, to present evidence, to be present at every stage of trial, to assist counsel, to a fair trial and to due process of law guaranteed by the state and federal constitutions were violated and denied when he was tried, convicted, sentenced and adjudged guilty while he was not competent to stand trial.
19. The trial court in arraigning petitioner on the crime charged denied and violated petitioner's constitutional right to appear, to be informed of the nature and cause of the accusation, to a fair trial and to due process of law.
20. Petitioner's conviction must be vacated because the trial court's instruction to the jury regarding the elements and facts necessary to convict petitioner of the aggravated first degree murder charge violated and denied petitioner his constitutional right to a fair trial, due process of law, equal protection of the law and to be informed of the nature of the charge.
21. Petitioner's conviction of aggravated first degree murder in violation of RCW 10.95.020(5) is unconstitutional and violative of Washington law because the verdict of guilty entered is inconsistent with the verdict of acquittal entered against his codefendant for the same offense.
22. RCW 10.95.020(5) as construed, interpreted and applied in petitioner's case is unconstitutional and the verdict finding the aggravating circumstance must be vacated.
23. Counsel's representation of petitioner at trial, the special sentencing proceeding and on appeal was deficient and ineffective and denied petitioner his right to a fair trial, due process of law and assistance of counsel guaranteed by the Sixth, Eighth and Fourteenth Amendments.
24. Washington's capital punishment law is a sentencing enhancement statute which authorized imposition of the enhanced sentence of death for the crime of first degree murder, a noncapital crime, in violation of the constitutional prohibition against imposing multiple punishment for commission of a single offense or act set forth by the double jeopardy clauses of both the state and federal constitutions.
[701]*70125. Washington's capital punishment statute is unconstitutional in that it violates the due process clause by establishing a mandatory presumption in favor of the death penalty and imposes on a defendant the burden of persuading the jury that death is not the appropriate sentence.
26. Washington's death penalty law, as construed by the Washington Supreme Court violates and denied a defendant rights guaranteed by the state and federal constitutions.
27. Washington's capital punishment is unconstitutional because it permits death penalty imposition only by a jury.
28. The discretionary authority to determine whether a defendant will be subject to the death penalty granted the prosecutor by Washington's death penalty statute violates the constitutional strictures and requirements of the fourth, fifth, sixth, eighth and fourteenth amendments to the constitution.
29. Washington's death penalty law violates the Eighth Amendment's prohibition against cruel and unusual punishment and Const. art. 1, § 14's prohibition against cruel punishment in that it does not meet the standard of reliability for determining that death is the appropriate punishment in a specific case.
30. RCW 10.95.040 violates the equal protection clause of the fourteenth amendment of the federal constitution and article 1, section 12 of the Washington State Constitution, by purporting to authorize the prosecution to seek different degrees of punishment for the same criminal act.
31. Washington's death penalty law, RCW 10.95, is an unconstitutional encroachment by the Legislature upon a determination which lies exclusively with the judiciary, violative of the separation of powers doctrine.
32. Washington's capital punishment law is an unconstitutional encroachment by the Legislature upon a determination which lies exclusively with the executive, violative of the separation of powers doctrine.
33. RCW 10.95 constitutes an unlawful delegation of legislative authority to the executive and/or judicial branches of government.
34. By the manner in which RCW 10.95.130(2) (b) dictates supreme court review of a death sentence, the Legislature has encroached upon a function reposed exclusively in the judiciary in violation of the constitutional doctrine of separation of powers.
35. Washington's capital punishment law is unconstitutional because it permits application of the preponderance of the evidence standard of proof to determine facts necessary to the enhancement and imposition of sentence.
[702]*70236. The constitutional defects of RCW 10.95 promote the unequal administration of the law, in violation of the equal protection clause of the Fourteenth Amendment.
Brachtenbach, Dore, Andersen, Callow, and Durham, JJ., concur.