¶1 Before the court are two consolidated cases based on the same facts. Robert A. Brown and Theodore M. Kosewicz were both involved in the kidnapping, torture, and killing of Sebastian Esquibel. At trial, Brown was convicted of first degree kidnapping and felony murder with the predicate felony being the first degree kidnapping. At a separate trial, Kosewicz was convicted of first degree kidnapping and first degree aggravated murder with the aggravating factor being the first degree kidnapping. On appeal, both Brown’s and Kosewicz’s first degree kidnapping convictions were overturned because of a charging defect. The Court of Appeals did not overturn Brown’s felony murder conviction or Kosewicz’s aggravating factor verdict. Brown and Kosewicz argue that reversal of the first degree kidnapping convictions requires reversal of the felony murder and aggravating factor verdict that were based in part on the first degree kidnapping. We affirm Brown’s felony murder conviction and Kosewicz’s aggravating factor verdict.
FACTS
¶2 On January 16, 2006, Sebastian Esquibel’s body was found buried beneath a woodpile with his hands and feet *687bound in jumper cables and a gunshot wound to the back of his head. The facts leading up to this murder were testified to as follows. Levoy Burnham was living in a fifth wheel trailer located on Brown’s property. Burnham had given Esquibel $800 for a scheduled drug deal with Carlton Hritsco. Esquibel failed to deliver the drugs to Burnham or to return Burnham’s money. Burnham brought Esquibel to his trailer, stripped him down to his underwear, and tied him up. Esquibel was intimidated and beaten over the course of two days by various people in an attempt to recover the missing money. Kosewicz and Brown were both involved at various times in this ordeal.
¶3 Brown admitted to detectives that while he was at the trailer, he guarded Esquibel with a gun, struck him in the head, and yelled at him. He also admitted checking on Esquibel’s claimed connections with a local gang and advised Burnham and the other captors that Esquibel, in fact, had no such connections. Brown eventually distanced himself from the situation, although he continued to monitor it from his house.
¶4 Burnham’s wife, Shannon Burnham, testified that Kosewicz arrived at the trailer for a short time. Ms. Burn-ham testified that Kosewicz interrogated Esquibel about the money and joined in the punching and kicking of Esquibel. Kosewicz consistently disputed this testimony, claiming that he never harmed Esquibel. Kosewicz left the trailer with Esquibel still restrained inside.
¶5 The next day, Burnham and two others took Esquibel by van to various places where Esquibel unsuccessfully tried to get the money. Brown did not go in the van with Esquibel, but Burnham picked up Kosewicz on the way. At some point, Esquibel’s captors lost patience and drove the van far out into the countryside. Burnham and Kosewicz exited the van with Esquibel and shot him in the head. Whether Kosewicz actually pulled the trigger is not clear, but Kosewicz, Burnham, and Esquibel walked away from the vehicle, a shot was fired, and only Kosewicz and Burnham returned.
*688f 6 The State charged Brown with several crimes, only two of which are relevant in this appeal — felony murder and first degree kidnapping. The felony murder charge was predicated on the felony of kidnapping in the first degree. The information expressly limited Brown’s first degree kidnapping charge by specifying that Brown, as an actor or accomplice, kidnapped Esquibel “with intent to inflict bodily harm.”1 Clerk’s Papers (CP) (Brown) at 148. However, Brown’s felony murder charge did not include the same limitation; the information alleged that Brown, as an actor or accomplice, murdered Esquibel in the course of “First Degree Kidnapping.” CP (Brown) at 148. At trial, Brown’s defense centered on disputing his accomplice liability. Although Brown admitted to detectives that he had hit Esquibel, yelled at him, and held him at gunpoint, his attorney summed up Brown’s defense as follows:
The things you are going to hear from the evidence today are that Mr. Brown was not part of this group. That is so very, very important. I hope I can have your detailed attention to that, to watch his individual actions in comparison with the group. The evidence is going to show that the group is Mr. Levoy Burnham, Carlton Hritsco, Theodore Kosewicz, Shannon Burnham to some degree, Amber Johnson, David Collins. This is the group. The evidence will show that these are the people that actually acted as accomplices, that aided in some way toward this goal *689that the state is here to prove today, the goal of kidnapping, the goal of murder. Their actions you will see. Mr. Brown’s actions on the outside. The evidence is going to show that.
3 Verbatim Report of Proceedings (VRP) (Brown) at 383.
¶7 In a separate trial, the State also charged Kosewicz with several crimes, including premeditated murder in the first degree with aggravating circumstances and kidnapping in the first degree. The aggravating circumstance was that the murder was committed during the first degree kidnapping. Similar to Brown, the State expressly limited the charge of kidnapping in the first degree, whether as an actor or accomplice, to kidnapping “with intent to inflict bodily injury.” CP (Kosewicz) at 36. However, in the charge of premeditated murder in the first degree with aggravating circumstances, the State did not include the same limitation, stating only that the murder was alleged to have occurred in the course of “kidnapping in the first degree.” CP (Kosewicz) at 36. Kosewicz’s defense also centered on disputing his accomplice liability. Kosewicz admitted to detectives that he knew Burnham wanted to scare Esquibel but that he had no knowledge of any intent to physically harm Esquibel. At trial, Kosewicz clarified that the purpose for his presence in the van was “[j]ust to have [Burnham’s] back, to make sure that nobody gets [Burnham] while he’s trying to get [Esquibel] back.” VRP (Kosewicz) (Jan. 28, 2008) at 35-36. Kosewicz disputed the prosecution’s assertion that he intended to scare Esquibel, or that he had ever told detectives that was his intent. Kosewicz consistently maintained throughout the trial that he neither physically harmed Esquibel nor knew of anyone else’s intent to kill Esquibel. Thus, Kosewicz’s defense appears to be that his mere presence was insufficient for him to be found guilty of kidnapping and murder.
¶8 The jury instructions in both Brown’s and Kosewicz’s trial defined kidnapping in the first degree as “[a] person commits the crime of kidnapping in the first degree when he or she intentionally abducts another person with intent to *690inflict bodily injury on the person or to inflict extreme mental distress on that person or on a third person.” CP (Brown) at 358; CP (Kosewicz) at 97. Neither Brown nor Kosewicz objected to this instruction on the ground that it included the alternative means of intent to inflict extreme mental distress in addition to intent to inflict bodily injury. Brown was convicted of kidnapping in the first degree and felony murder, with the predicate felony being kidnapping in the first degree. Kosewicz was convicted of kidnapping in the first degree and premeditated murder in the first degree. In connection with the premeditated murder charge, the jury returned a special verdict finding the aggravating circumstance that Kosewicz’s murder was committed in the course of kidnapping in the first degree.
|9 In unpublished opinions, the Court of Appeals reversed both Brown’s and Kosewicz’s kidnapping convictions. State v. Kosewicz, noted at 150 Wn. App. 1055, 2009 WL 1765941, 2009 Wash. App. LEXIS 1542; State v. Brown, noted at 156 Wn. App. 1035, 2010 WL 2403353, 2010 Wash. App. LEXIS 1292. The Court of Appeals held that the trial court’s instructions violated Brown’s and Kosewicz’s right to adequate notice of the charges against them because the instructions made it possible for the jury to convict Brown and Kosewicz of kidnapping in the first degree under an alternative means that was not included in their informations. Kosewicz, 2009 WL 1765941, at *4-5, 2009 Wash. App. TEXIS 1542, at *2; Brown, 2010 WL 2403353, at *2-3, 2010 Wash. App. LEXIS 1292, at *6-7. Despite reversing the kidnapping convictions, the Court of Appeals upheld Brown’s felony murder conviction and Kosewicz’s premeditated murder with aggravating circumstances conviction. Kosewicz, 2009 WL 1765941, at *5, 2009 Wash. App. LEXIS 1542, at *6; Brown, 2010 WL 2403353, at *5, 2010 Wash. App. LEXIS 1292, at *12. Brown and Kosewicz appealed, and we consolidated their cases and granted review solely on the issues of whether the validity of the felony murder and aggravated murder convictions was affected by the reversal of the *691kidnapping convictions. State v. Brown, 170 Wn.2d 1002, 245 P.3d 226 (2010); State v. Kosewicz, 168 Wn.2d 1026, 230 P.3d 1060 (2010).2
ANALYSIS
¶10 Because both Brown’s and Kosewicz’s first degree kidnapping convictions were reversed on the ground that the defendants were provided insufficient notice, we must decide whether that inadequate notice permeated the informations, requiring reversal of Brown’s felony murder conviction and Kosewicz’s aggravating factor verdict. The accused in a criminal case has a constitutional right to notice of the alleged crime the State intends to prove. Wash. Const. art. I, § 22; U.S. Const. amend. VI. Notice is provided through the information. CrR 2.1(a)(1). The State must include all essential statutory and court imposed elements of an alleged crime in the information. State v. Kjorsvik, 117 Wn.2d 93, 101-02, 812 P.2d 86 (1991). The purpose of this essential elements rule is to sufficiently apprise the defendant of the charges against them so that he or she may prepare a defense. Id. at 101.
¶11 Regarding Brown’s felony murder charge, the State had the burden to prove that Brown “committed] . . . kidnapping in the first or second degree, and in the course of or in furtherance of such crime or in immediate flight therefrom, [Brown], or another participant, cause[d] the death of a person other than one of the participants.” RCW 9A.32.030(l)(c). While a predicate felony, such as kidnapping in the first degree, is an element of this felony murder charge, the defendant is not actually charged with the *692underlying crime. State v. Whitfield, 129 Wash. 134, 139, 224 P. 559 (1924). The predicate felony merely substitutes for the mental state the State is otherwise required to prove. State v. Craig, 82 Wn.2d 777, 781, 514 P.2d 151 (1973). Therefore, Washington courts have long held that the underlying elements of the predicate felony are not essential elements of felony murder and do not have to be included in the information. State v. Hartz, 65 Wn. App. 351, 354, 828 P.2d 618 (1992) (citing State v. Anderson, 10 Wn.2d 167, 180, 116 P.2d 346 (1941); State v. Ryan, 192 Wash. 160, 164-65, 73 P.2d 735 (1937); State v. Fillpot, 51 Wash. 223, 228, 98 P. 659 (1908)). Because the elements of the predicate felony need not be pleaded, the information also does not need to specify the alternative means of committing a crime on which the State will ultimately rely. Id. at 354-55.
¶12 Brown’s information included all of the required essential elements of his felony murder charge. The information charged Brown with “causing] the death of SEBASTIAN L. ESQUIBEL” as either a principal or an accomplice, “while committing or attempting to commit the crime of First Degree Kidnapping, and in the course of and in furtherance of said crime and in immediate flight therefrom.” CP (Brown) at 148. Unlike Brown’s stand-alone charge of kidnapping in the first degree, the State did not enumerate a particular alternative means of committing kidnapping for the purpose of felony murder. Therefore, all alternative means of proving kidnapping in the first degree as a predicate felony could potentially be argued by the State. Viewing Brown’s felony murder charge alone, the State pleaded all essential elements of the crime for the purpose of the constitutional notice requirements.
¶13 Regarding Kosewicz’s aggravating factor verdict, his information alleged that Kosewicz, as an actor or accomplice, murdered Esquibel “in the course of, in furtherance of or immediate flight from the crime of First Degree Kidnapping.” CP (Kosewicz) at 132. We recently held that an aggravated factor is not the functional equivalent of an *693essential element and, thus, need not be charged in the information to provide adequate notice to the defendant. State v. Siers, 174 Wn.2d 269, 274 P.3d 358 (2012). The holding in Siers adopted the lead opinion’s decision in State v. Powell, 167 Wn.2d 672, 223 P.3d 493 (2009) (plurality opinion), that “ ‘[d]ue process is satisfied when the defendant receives sufficient notice from the State to prepare a defense against the aggravating circumstances that the State will seek to prove in order to support an exceptional sentence.’ ” Siers, 174 Wn.2d at 278 (quoting Powell, 167 Wn.2d at 682). Due process was satisfied in Siers where the State provided notice to the defendant prior to trial that it intended to seek a good Samaritan aggravator on an assault charge. Id. This court has never held that where the aggravating factor requires proof of a separate offense, the elements or alternative means of proof of the separate offense must also be pleaded. Requiring the State to plead the elements and alternative means of an underlying offense in an aggravating factor would be incongruous with our recognition above that the underlying elements and alternative means of a predicate felony need not be pleaded in the information.
¶14 Kosewicz’s information pleaded the elements of premeditated murder in the first degree and identified that “the murder was committed in the course of, in furtherance of or in immediate flight from, the crime of Kidnapping in the First Degree.” CP (Kosewicz) at 36. The State gave notice of its intent to prove the kidnapping aggravating factor and included all the essential elements of premeditated murder in the first degree charge. Therefore, viewing the first degree murder charge alone, Brown cannot argue that his notice was constitutionally inadequate for failure to plead the essential elements of the charged crime.
¶15 Ordinarily, finding that all the essential elements of Brown’s felony murder charge and Kosewicz’s first degree murder charge were included in the information would conclude our analysis, and both convictions would be af*694firmed. However, this case presents unique circumstances. Brown’s and Kosewicz’s informations are unusual because the source of the allegedly inadequate notice arose from the State limiting the stand-alone kidnapping charge to the alternative means of intent to inflict bodily injury, while placing no such limitation on the first degree kidnapping allegation when it was included as a predicate felony or aggravating factor. Because only one kidnapping occurred, Brown and Kosewicz argue that they only had notice that the State intended to prove kidnapping with the intent to inflict bodily harm for all charged crimes where kidnapping in the first degree was at issue. Recognizing the imprecise nature of the State’s charging document,3 we proceed with our notice analysis, although the result is the same.
¶16 A defendant may bring a constitutional challenge to the information at any time before final judgment. City of Seattle v. Jordan, 134 Wash. 30, 34, 235 P. 6 (1925). However, when a party challenges the information for the first time on appeal, we apply the liberal construction rule. Kjorsvik, 117 Wn.2d at 105-08. The liberal construction rule is a two pronged test that has been described as follows:
When a defendant challenges the information for the first time on appeal, we determine if the elements “appear in any form, or by fair construction can they be found, in the charging document.” [Kjorsvik, 117 Wn.2d] at 105. We read the information as a whole, according to common sense and including facts that are implied, to see if it “reasonably apprise [s] an accused of the elements of the crime charged.” Id. at 109. If it does, the defendant may prevail only if he can show that the unartful charging language actually prejudiced him. Id. at 106.
*695State v. Nonog, 169 Wn.2d 220, 227, 237 P.3d 250 (2010) (second alteration in original). “This 2-prong standard of review strikes a balance: on the one hand it discourages the defense from postponing a challenge to the charge knowing the charging document is flawed; on the other hand, it insures that the State will have given fair notice of the charge to the defendant.” Kjorsvik, 117 Wn.2d at 106.
¶17 Under the first prong of the liberal construction rule we inquire whether the allegedly missing alternative means can be found by fair construction in the whole of the charging document, thus reasonably apprising the defendants of the elements of the crime charged. Nonog, 169 Wn.2d at 227. Brown’s felony murder charge did not limit the alternative means to intent to inflict bodily injury. The felony murder charge simply stated that Brown, “while committing or attempting to commit the crime of First Degree Kidnapping, and in the course of and in furtherance of said crime and in immediate flight therefrom, did cause the death of SEBASTIAN L. ESQUIBEL.” CP (Brown) at 124 (emphasis added). Therefore, reading Brown’s information as a whole, Brown was reasonably apprised that both intent to inflict bodily injury and intent to inflict emotional distress were at issue.
¶18 Similarly, Kosewicz was reasonably apprised that intent to inflict extreme mental distress was an alternative means to proving kidnapping in the first degree as an aggravating factor to premeditated murder. His premeditated murder charge itself stated that the murder was “committed in the course of, in furtherance of or in immediate flight from, the crime of Kidnapping in the First degree.” CP (Kosewicz) at 36. No limitation on kidnapping in the first degree was included in this charge that would restrict the prosecution’s case to proving only intent to inflict bodily harm. Thus, by fair construction, Kosewicz was reasonably appraised that the State could seek to prove kidnapping with intent to inflict extreme mental distress as an aggravating factor.
*696¶19 Turning to the second prong of the liberal construction rule, we inquire whether the information’s unartful language prejudiced the defendants. Our analysis in Kjorsvik is instructive here. In Kjorsvik, we held that the defendant had not been prejudiced by a charging document that failed to enumerate the common law element of robbery — “ ‘intent to steal.’ ” 117 Wn.2d at 111 n.37. In reaching this holding, the court noted that at trial the defendant did not make any argument that he lacked the intent to steal and that the jury instructions, which were not objected to at trial, clearly enumerated the missing common law intent element. Id.
¶20 Brown’s and Kosewicz’s prejudice claim should be dismissed for similar reasons as the defendant in Kjorsvik. Neither Brown’s nor Kosewicz’s defense depended on drawing a distinction between their intent to inflict bodily harm or their intent to inflict extreme mental distress. Brown confessed to the police that he struck Esquibel during the kidnapping and that his associates tortured and intended to scare Esquibel into returning the money. Brown only disputed that he committed or otherwise aided in the kidnapping and was not present during the planning or initiation of these crimes. Brown essentially argues that he did nothing more than fail to come to the aid of the victim and thus lacks accomplice liability.
¶21 As for Kosewicz, on cross-examination he disputed the prosecution’s assertion that he intended to physically harm or scare Esquibel. In his opening statement, Kosewicz’s attorney drew no distinction between Kosewicz’s intent to cause bodily harm versus his intent to cause extreme mental distress. Instead, he effectively disputed both intents by arguing simply that Kosewicz was not an accomplice to the kidnapping or murder. Both Brown’s and Kosewicz’s defenses suggest that they were not prejudiced by a lack of notice because both defenses centered on them not being accomplices, not on whether they intended bodily harm versus extreme mental distress.
*697¶22 Moreover, neither Brown nor Kosewicz objected to the jury instructions on the ground that the definition of kidnapping in the first degree expressly permitted the jury to convict if the jury found the defendants had the intent to inflict extreme mental distress. In fact, both sets of jury instructions stressed both alternative means for proving kidnapping in the first degree in two separate jury instructions. At Kosewicz’s trial, the State even moved to amend the to convict instruction for first degree kidnapping (instruction 14) to add language implicating accomplice liability. Even when this specific instruction was discussed in open court, Kosewicz declined to object to the unamended portion of the instruction that expressly included intent to inflict extreme mental distress as an available alternative means of proof. Given the failure to object to these jury instructions, and the nature of both defendants’ cases turning on accomplice liability rather than their particular intent, we hold that neither Brown nor Kosewicz have demonstrated actual prejudice from the unartful language in their instructions. Since we conclude that Brown’s felony murder charge and Kosewicz’s aggravated premeditated murder charge were sufficient to give the defendants reasonable notice of the essential elements of the charges against them, and that they suffered no prejudice from the manner in which the crimes were charged, there is no reversible error and both convictions are affirmed.
¶23 The concurrence/dissent concedes that our recent decision in Siers requires affirming Kosewicz’s conviction. Concurrence/dissent at 705-06. It also admits our holding today with respect to Brown is consistent with our older cases. Id. at 699. Nevertheless, the concurrence/dissent goes on to quarrel that our jurisprudence on this issue is a “series of technicalities” and complains there is no “intellectually satisfying reason to treat crimes that are elements of another crime differently for notice purposes than crimes that are charged.” Id. at 699, 700. The concurrence/dissent would ignore a long line of our cases tracing back to 1908. *698Those cases explicitly distinguished between the essential elements necessary for a charged crime and those necessary for a predicate crime. See Fillpot, 51 Wash. at 228.
¶24 We are unwilling to ignore, or dismiss as outdated, our case law on this issue. The defendant is not actually charged with the predicate crime and therefore the notice standard is different. Our decision today also harmonizes our jurisprudence by acknowledging this distinction where an aggravating factor involves a separate offense. In our view, it is not a mere technicality to hold that Brown and Kosewicz received adequate constitutional notice of the charges against them. This holding faithfully applies established and reasoned case law to the facts at hand under the proper standard of review.
CONCLUSION
¶25 Brown’s and Kosewicz’s informations provided sufficient notice of the charges against them. We affirm Brown’s conviction for felony murder. We affirm Kosewicz’s first degree kidnapping aggravating factor verdict and his conviction for premeditated murder in the first degree with aggravating circumstances.
Madsen, C.J.; Owens and J.M. Johnson, JJ.; and Alexander, J. Pro Tem., concur.Kidnapping in the first degree is a multiple means crime that may be proved in five alternative ways:
(1) A person is guilty of kidnapping in the first degree if he intentionally abducts another person with intent:
(a) To hold him for ransom or reward, or as a shield or hostage; or
(b) To facilitate commission of any felony or flight thereafter; or
(c) To inflict bodily injury on him; or
(d) To inflict extreme mental distress on him or a third person; or
(e) To interfere with the performance of any governmental function.
(2) Kidnapping in the first degree is a class A felony.
ROW 9A.40.020. The State may charge a defendant with one or all of the alternative means outlined in the statute. State v. Bray, 52 Wn. App. 30, 34, 756 P.2d 1332 (1988). If the information charges an alternative means crime, and lists only one alternative, it is error to instruct the jury that it may consider any of the other alternative means for the purposes of that charge. Id.
Kosewicz argues in his supplemental brief to this court that his aggravating factor of kidnapping in the first degree must be reversed because the jury instructions permitted the jury to find this sentencing enhancement under a theory of accomplice liability rather than direct liability. Kosewicz argues that this is a violation of his rights under article I, section 14 of the Washington Constitution (“Excessive bail shall not be required, excessive fines imposed, nor cruel punishment inflicted.”). We did not accept review of this issue and decline to address this argument here. See RAP 2.3(e).
In some sense, it is surprising that the parties failed to correct this issue sooner. It is unclear why the State would choose to construct its charges against Kosewicz and Brown in such an unartful way. The State could have enumerated the alternative means that it would attempt to prove in all counts where first degree kidnapping was at issue. Alternatively, it is surprising that neither Brown nor Kosewicz objected to two separate jury instructions enumerating the allegedly uncharged alternative means. This issue could have been easily prevented by either the State taking greater care in crafting the information or the defendants raising a timely objection or moving for a bill of particulars to clarify the information.