Opinion by Judge MINER; Partial Concurrence and Partial Dissent as to Part III by Judge WARDLAW.
MINER, Circuit Judge:
I. Introduction
Alberto Francisco Briceno appeals from a judgment of the United States District Court for the Central District of California (Morrow, J.) denying his petition for a writ of habeas corpus. Briceno was convicted, following a jury trial, of four counts of second degree robbery and four counts of street terrorism in the Superior Court of Orange County. The jury also found that the robberies were committed for the benefit of a criminal street gang. Briceno pursued various challenges to his convictions in the California state courts and in the District Court. Ultimately, we granted a certificate of appealability as to two issues that are now before us to resolve: “(1) whether there is sufficient evidence to support the gang enhancement convictions for each robbery; and (2) whether the trial court erred by allowing the prosecution’s expert to testify that the gang enhancement allegations were true.” See 28 U.S.C. § 2253(c)(3). After setting forth the background facts, we analyze these issues in reverse order, answering both in the negative.
II. Of the Crimes
Briceno and Evaristo Landin robbed four individuals in Orange County on Christmas Day 2000 in what the California Court of Appeal aptly characterized as a “grinchly crime wave.” People v. Briceno, 109 Cal.App.4th 1330, 135 Cal.Rptr.2d 912, 913 (2003), rev’d in part on other grounds, 34 Cal.4th 451, 20 Cal.Rptr.3d 418, 99 P.3d 1007 (2004). The two gained little from their criminal forays. Both were members of the Hard Times Street Gang, and Lan-din’s forearms were marked with the gang’s tattoos. Their first victim was Ross Lambert, whom they held at gunpoint outside a bar in Costa Mesa at about 1:00 A.M. Lambert gave them the $10.50 he had in his pocket, and he felt a sharp object placed against his neck when they demanded more. Lambert apparently had no more to give, and the two thieves drove away in a Cadillac, whose license plate Lambert recorded before contacting the police.
About an hour and a half later, Richard Jess noticed a parked sedan with its headlights on as he was walking through a Comfort Inn parking lot. Landin approached him from the rear, put his arm around Jess’s neck, stuck a gun in his ribs, and demanded his valuables. Landin was able to extricate only $2.00 from Jess. During this time, the sedan was moving forward slowly in an adjoining parking lot. After the encounter, Jess saw Landin, who [1073] was wearing a stocking cap and designer jeans, run over to, and enter, the sedan.
Within the hour, Judy Yonamine arrived at her residence in Garden Grove. As she unloaded some items from the trunk of her car, another car pulled up and stopped, with its lights on and its engine still running. Landin emerged from the front passenger side and asked for money. When Yonamine said she had none, Landin produced a gun and took her wallet, which contained $25.00. Landin then ran back to the car, which sped away. Soon thereafter, Landin approached Jesus Mendoza, who was unloading his van in Anaheim. Mendoza gave up his wallet and $18.00 in cash when Landin pointed a pistol at him.
Landin was in the passenger seat and Briceno was behind the wheel when Anaheim Officer Raymond Drabek stopped the Cadillac sedan in which they were traveling as it made a U-turn on Harbor Boulevard near Disneyland. The car and license plate number matched the description provided by the robbery victims. Discovered under the front passenger seat were $300.00 in cash and a pellet gun. A beanie cap identified by one of the victims as worn by one of the perpetrators was found in the Cadillac, and small amounts of cash were found on both Landin and Briceno.
III. Of the Trial
At trial in the Superior Court, the prosecution sought to persuade the jury that the four robberies were committed for the benefit of, at the direction of, or in association with a criminal street gang, in order to call forth the enhanced penalties attendant to such a finding under California law. See Cal. Penal Code § 186.22(b). In this connection, counsel for the prosecution and counsel for Briceno agreed to the following oral stipulation, which was read to the jury:
It is stipulated between the People and Defendant Briceno that Hard Times was a criminal street gang within the meaning of Penal Code Section 186.22 at all times relevant to this case.
It is further stipulated that on 12/25/2[ ]000, that Defendant Briceno actively participated in the Hard Times criminal street gang with knowledge that the Hard Times members have engaged in a pattern of criminal gang activity, as defined in Penal Code Section 186.22. It is specifically not stipulated that Defendant Briceno aided and abetted another gang member in committing the crime of [robbery] on 12/25/2[ ]000.
Following the reading of the Stipulation, the court instructed the jury that the Stipulation applied to Briceno only and not to Landin, who was charged as a co-defendant and with whom Briceno was being jointly tried.
In support of the criminal street gang enhancement, the prosecution also presented the trial testimony of Peter Vi, who was employed in the position of Gang Investigator by the City of Garden Grove Police Department. Vi related his training and experience in the investigation of criminal street gangs and was offered as an expert witness by the prosecution. He testified that he had made several hundred arrests related to gang membership and described the structure, operations, culture, and criminal activities of gangs generally.
Vi related the manner in which members are inducted into gangs, the conduct required of gang members, and their duties of loyalty to the gang. He also described the symbols of gang membership, including tattoos and “monikers” (i.e., names given to gang members by other members). With regard to the role of respect in gang culture, Vi testified:
[1074] Respect means everything to a gang member. You know, he lives and dies by this term, respect. Respect means power and they gain respect by using violence to gain their power. And not only respect of self, for the gang, gain their status in the gang, increase their recruitment of gang members into that gang.
Vi testified that he was familiar with the activitiés of the Hard Times street gang, having been assigned to patrol its area of operations. He described Hard Times as a “territorial street gang” and as a “criminal street gang” that dominated a three-block neighborhood in Garden Grove. Vi estimated the total membership of the gang as approximately two hundred. According to Vi, gang members usually commit crimes with other gang members, and robbery is considered a status-enhancing act. The following question was put to Vi at trial:
Now, if I were to ask you to assume that we had two Hard Times criminal street gang members, one driving, one in the passenger seat, drive to Costa Mesa on December 25th of the year 2000, and then at a little after 1:00 a passenger got out, pointed a pellet gun at one and robbed him of money and got back into the car and the two Hard Time members drove off, and then at a little after 2:30 A.M., in Anaheim, same two individuals with the same person driving approached a second person, passenger getting out, pulling the pellet gun and, once again, robbing an individual of money, getting back in the car and driving off.
And then assuming further that around 3:30 that same morning, that a third individual is approached in an alley off Mallul Street in Anaheim, once again, same person driving, passenger gets out, points the pellet gun at somebody and takes money from him, and then a few minutes later, or around the same time, right around 3:30 in Garden Grove on Bayport, the same two individuals with the same person driving, the passenger gets out of the car, goes up to an individual, displays the gun in some manner and take properties from her, and then gets back into the car and drives off, and then the same two individuals are stopped five to ten minutes later at Ka-tella and Anaheim.
Do you have an opinion as to whether or not the crimes of [robbery], each one of those four crimes were committed for the benefit of, at the direction of, or in association with the criminal street gang Hard Times, and with intent to promote, further and assist criminal conduct by members of the Hard Times gang?
Vi’s response, following an overruled objection, was as follows:
My opinion is that, based on the scenario you gave me, the two Hard Timers, the crimes they were involved in benefit the gang itself, the action that they have done to glorify the gang.
Not only do they glorify the gang but personally they increase the status of those two in the gang itself, because, one, they commit this crime, the possibility of them involving other crimes are or being asked to do other crimes in the gang—
It gives them the opportunity to participate in other crimes if other Hard Timers solicit them to assist.
Subsequently, Vi was asked whether it would change his opinion to know that the robberies were committed to buy Christmas presents. He said it would not, because the status of the individuals would nevertheless be increased within the gang. On cross-examination, when asked about a robbery involving only a small amount of money, he responded that “it would glorify [1075] the gang not in the amount taken but it would glorify the gang that the actions were taken by the gang members.”
On July 13, 2001, the jury convicted Briceno of four counts of second degree robbery, in violation of California Penal Code § 211, and four counts of street terrorism, in violation of California Penal Code § 186.22(a). The jury also found that all four robberies were committed for the benefit of, at the direction of, or in association with a criminal street gang within the meaning of California Penal Code § 186.22(b)(1). The jury made the same findings as to Landin.
The trial court found separately that Briceno had committed two prior serious or violent felonies within the meaning of the California Three Strikes Law and had previously served a prison term. Taking all factors into account and staying the imposition of the sentence for the street terrorism convictions, the court imposed upon Briceno an indeterminate sentence of 27 years to life and a determinate sentence of 23 years and 4 months. Included in the sentences were enhancements based on the criminal street gang findings.
IV. Of the State Court Appeals and the Habeas Petition
Briceno appealed his conviction to the California Court of Appeal. On June 20, 2003, the Court of Appeal issued an opinion in which it held that the criminal street gang enhancements provided under § 186.22 “cannot be used to transform an unenumerated offense into a ‘serious’ felony” under the California Penal Code. See Briceno, 135 Cal.Rptr.2d at 913. Accordingly, the Court of Appeal found that one of Briceno’s prior convictions did not qualify as a serious or violent felony under California’s Three Strikes Law, and remanded his case for resentencing. The Court of Appeal affirmed Briceno’s judgment in all other respects. Id.
Thereafter, Briceno filed a petition for review in the California Supreme Court, contending that the admission in evidence of the gang expert’s opinion testimony violated his jury trial and due process rights. He also contended that there was insufficient evidence to support one of his robbery convictions and the gang enhancements. The State of California also petitioned the California Supreme Court for review, asserting that the Court of Appeal erred in finding that felonies with gang enhancement are not serious felonies under the California Three Strikes Law. On September 24, 2003, the Supreme Court granted the State’s petition only and, on November 4, 2004, issued its opinion in the case. People v. Briceno, 34 Cal.4th 451, 20 Cal.Rptr.3d 418, 99 P.3d 1007 (2004). In the opinion, the court determined that felonies with gang enhancements are serious felonies within the meaning of California’s Three Strikes Law. Id. at 1014-15; see also Cal.Penal Code § 667. The court therefore reversed the judgment of the Court of Appeal insofar as it found that one of Briceno’s convictions did not qualify as a serious felony, and affirmed the judgment in all other respects. Briceno, 20 Cal.Rptr.3d 418, 99 P.3d at 1015.
On May 16, 2005, Briceno filed a petition for a writ of habeas corpus pursuant to 28 U.S.C. § 2254 in the United States District Court for the Central District of California. In his petition, Briceno advanced the following three grounds for relief:
Petitioner was denied due process and a trial by jury as a result of the gang expert’s improper opinion testimony....
Petitioner was denied due process because there was insufficient evidence to support the robbery conviction on count 4 and the gang enhancements on Counts 1-4 beyond a reasonable doubt....
[1076] Petitioner was denied due process because there was insufficient evidence that his 1998 conviction was a prior felony conviction for purposes of the 3 strikes law and the enhancement under Pen.Code sec 667(a).
On May 11, 2006, Magistrate Judge Lum issued a comprehensive Report and Recommendation recommending denial of the petition in all respects. The District Judge adopted the Report and Recommendation over Briceno’s objections in an Order dated July 19, 2006, and directed that judgment be entered dismissing the petition with prejudice. On May 11, 2007, the District Court issued an Order denying an application filed by Briceno for a certificate of appealability, finding that Briceno “has not made a substantial showing of the denial of a constitutional right, as is required to support the issuance of a Certificate of Appealability.” An application for a certificate thereafter made to this court was granted by Order filed on August 2, 2007, with respect to the issues set forth in Part I above.
ANALYSIS
I. Of the Standards to be Applied
We are constrained to undertake a de novo review of a district court’s decision to deny a petition for habeas corpus. See Lambert v. Blodgett, 393 F.3d 943, 964 (9th Cir.2004). Habeas relief cannot be granted to a state prisoner “with respect to any claim that was adjudicated on the merits in State court ... unless the adjudication of the claim ... resulted in a decision that was contrary to, or involved an unreasonable application of, clearly established Federal law, as determined by the Supreme Court of the United States;” or “was based on an unreasonable determination of the facts in light of the evidence presented in the State court proceeding.” 28 U.S.C. § 2254(d). Briceno seeks habe-as relief from the state-court adjudication in his case on the basis of the first of these standards.
The Supreme Court has observed that § 2254(d) established a “highly deferential standard for evaluating state court rulings.” Woodford v. Visciotti, 537 U.S. 19, 24, 123 S.Ct. 357, 154 L.Ed.2d 279 (2002) (quoting Lindh v. Murphy, 521 U.S. 320, 333 n. 7, 117 S.Ct. 2059, 138 L.Ed.2d 481 (1997)). A state court’s decision is “contrary to” clearly established federal law only where “the state court arrives at a conclusion opposite to that reached by [the Supreme] Court on a question of law or if the state court decides a case differently than [the Supreme] Court has on a set of materially indistinguishable facts.” Williams v. Taylor, 529 U.S. 362, 412-13, 120 S.Ct. 1495, 146 L.Ed.2d 389 (2000). There is an “unreasonable application” of clearly established federal law when a state court “correctly identifies the governing legal rule but applies it unreasonably to the facts of a particular prisoner’s case.” Id. at 407-08, 120 S.Ct. 1495. A state court decision can also involve an unreasonable application of clearly established precedent “if the state court either unreasonably extends a legal principle from [the Supreme Court’s] precedent to a new context where it should not apply or unreasonably refuses to extend that principle to a new context where it should apply.” Id. at 407, 120 S.Ct. 1495. The state court’s error must be one that the habeas court concludes is objectively unreasonable, not merely erroneous or incorrect. Id. at 409-11, 120 S.Ct. 1495.
II. Of the Challenge to the Expert Testimony
Briceno contends that the state appellate court, in affirming the state trial court, unreasonably applied established federal law by allowing expert testimony [1077] violative of his constitutional right to due process and a fair trial. Specifically, Bri-ceno asserts that a reasonable application of settled law would result in a finding of constitutional error in admitting Peter Vi’s testimony that the robberies for which Bri-ceno was convicted were committed for the benefit of a criminal street gang. It will be remembered that Vi was given a hypothetical question asking him to assume the precise facts of the robberies and, based on these facts, to tell the jury whether each crime was committed “for the benefit of, at the direction of, or in association with the criminal street gang Hard Times, and with intent to promote, further and assist criminal conduct by members of the ... gang.” Vi’s response, the object of this challenge, was to give his “opinion ... that ... the two Hard Timers, the crimes they were involved in benefit the gang itself, the action that they have done to glorify the gang.”
Briceno claims that Vi’s “testimony should have been excluded because it was based on facts insufficient to support an opinion on the issue, constituted improper opinion on guilt, and essentially directed the jury to find the gang enhancements true.” In holding that the trial court did not abuse its discretion in determining that Vi’s expert opinion would assist the jury in deciding whether the prosecution had proved the gang enhancement allegations, the appellate court referred to California precedent:
As People v. Olguin (1994) 31 Cal.App.4th 1355, 37 Cal.Rptr.2d 596[,] explains, “[t]he requirements for expert testimony are that it relate to a subject sufficiently beyond common experience as to assist the trier of fact and be based on matter that is reasonably relied upon by an expert in forming an opinion on the subject to which his or her testimony relates. Such evidence is admissible even though it encompasses the ultimate issue in the case.”
People v. Briceno, Nos. G029525, G029607, 2003 WL 1710927, at *2 (Cal.Ct.App. Mar.28, 2003) (internal citations omitted). Indeed, California Evidence Code § 801(a) provides that an expert witness may give opinion testimony if the opinion is “[rjelat-ed to a subject that is sufficiently beyond common experience that the opinion of an expert would assist the trier of fact.” Applying its precedent, the Court of Appeal found that “Vi’s expert testimony focused on whether these particular incidents were ‘gang-related activity.’ ... Vi did not offer opinions on the definitions of crimes, whether a crime had been committed, or on defendant’s guilt.” Briceno, 2003 WL 1710927, at *2 (internal citations omitted).
In any event, evidence erroneously admitted warrants habeas relief only when it results in the denial of a fundamentally fair trial in violation of the right to due process. See Estelle v. McGuire, 502 U.S. 62, 67-68, 112 S.Ct. 475, 116 L.Ed.2d 385 (1991). Federal habeas courts do not review questions of state evidentiary law. Id. Our habeas powers do not allow us to vacate a conviction “based on a belief that the trial judge incorrectly interpreted the California Evidence Code in ruling” on the admissibility of evidence. Id. at 72, 112 S.Ct. 475. With regard to expert testimony, we recently noted that we have found no cases “supporting] the general proposition that the Constitution is violated by the admission of expert testimony concerning an ultimate issue to be resolved by the trier of fact.” Moses v. Payne, 543 F.3d 1090, 1105 (9th Cir.2008). “Although ‘[a] witness is not permitted to give a direct opinion about the defendant’s guilt or innocence .... an expert may otherwise testify regarding even an ultimate issue to be resolved by the trier of fact.’ ” Id. at 1106 (quoting United States v. Lockett, 919 F.2d 585, 590 (9th Cir.1990) (alteration in original)). We found this “not surprising,” id., [1078] in light of the well-established rule permitting opinion testimony on ultimate issues, see Hangarter v. Provident Life & Accident Ins. Co., 373 F.3d 998, 1016 (9th Cir.2004).
The thrust of Briceno’s evidentiary challenge is that Vi’s testimony that the hypothetical robberies would have been gang-related should have been excluded as pertaining to an ultimate issue for the jury. Our recent decision in Moses forecloses such a challenge, as it holds that there is no clearly established constitutional right to be free of an expert opinion on an ultimate issue. See 543 F.3d at 1105-06. Accordingly, the admission of the opinion testimony of Peter Vi cannot be said to be contrary to, or an unreasonable application of, Supreme Court precedent.
III. Of the Sufficiency of the Evidence to Support the Gang Enhancement Penalties
Briceno also argues that the evidence at trial was insufficient to support the enhancements, as there was not sufficient evidence to sustain the conclusion that the robberies were committed with the specific intent to benefit a criminal street gang. We agree.
To prevail on an insufficiency of evidence claim, a habeas petitioner must show that “upon the record evidence adduced at the trial[,] no rational trier of fact could have found proof of guilt beyond a reasonable doubt.” Jackson v. Virginia, 443 U.S. 307, 324, 99 S.Ct. 2781, 61 L.Ed.2d 560 (1979). An additional layer of deference is added to this standard by 28 U.S.C. § 2254(d), which obliges Briceno to demonstrate that the state court’s adjudication entailed an unreasonable application of the quoted Jackson standard. See Juan H. v. Allen, 408 F.3d 1262, 1274 (9th Cir.2005).
To warrant a gang enhancement, California law requires the prosecutor to prove two things. First, the prosecutor must demonstrate that the defendant committed a felony “for the benefit of, at the direction of, or in association with [a] criminal street gang.” Cal.Penal Code § 186.22(b)(1). Second, the prosecutor must show that the defendant committed the crime “with the specific intent to promote, further, or assist in any criminal conduct by gang members.” Id. We have previously recognized the importance of keeping these two requirements separate, and have emphasized that the second step is not satisfied by evidence of mere membership in a criminal street gang alone. See Garcia v. Carey, 395 F.3d 1099, 1102-03 & n. 5 (9th Cir.2005).
The California Court of Appeal limited its analysis of the sufficiency of the evidence supporting the criminal street gang enhancements to the following:
Defendants note there was evidence to show the crimes were committed for personal gain (money to buy Christmas gifts) rather than any gang-related purpose. The problem with this argument is that[it] ignores Vi’s expert testimony explaining how the commission of these crimes would enhance the reputation not only of the gang itself but of the individual participants as well. Based on this evidence, the jurors could reasonably have found the gang enhancement allegations were true. It was for the jurors to resolve any credibility issues or conflicts in the evidence. We cannot second-guess their decision on appeal.
Briceno, 2003 WL 1710927, at *3. Under our case law, this analysis represents an unreasonable application of the Jackson standard, for several reasons.
First, Vi’s testimony did not establish Briceno’s specific intent in committing the robberies, nor could it. Vi’s testimony dealt almost exclusively in hypotheticals; he did not provide any direct or circum[1079] stantial evidence of Briceno and Landin’s own intent. Even when asked whether he had “an opinion as to whether or not [the robberies] ... were committed ... with intent to promote, further and assist criminal conduct by members of the Hard Times gang,” Vi did not provide such an opinion. Instead, he responded in generalities, stating that such crimes “glorif[ied]” the gang and increased the status of the offenders.1 Although we need not decide whether there was sufficient evidence with regard to the first prong of the gang enhancement, Vi’s testimony might have helped to establish the first element of the gang enhancement, ie., that the crime ultimately benefitted the gang in some way. But it says nothing about Briceno’s specific intent in committing the robberies.2
Second, the California Court of Appeal’s analysis runs afoul of this court’s decision in Garcia v. Carey. In Garcia, the defendant, a known gang member, robbed the victim “in an area known to be in the heart of the gang’s ‘turf.’ ” 395 F.3d at 1103. Although a police expert testified that the defendant’s gang was “turf-oriented,” we held that there was insufficient evidence to warrant an enhanced sentence under § 186.22(b)(1) because there was no evidence, aside from the gang expert’s generic testimony, “that would support an inference that Garcia robbed [the victim] with the specific intent to facilitate other criminal conduct by the [gang].” Id. Aside from evidence of Garcia’s gang membership, the record was “singularly silent” as to “what criminal activity of the gang was ... intended to be furthered by the robbery.” Id. We concluded that this lack of evidence triggered application of the Jackson standard, as “[w]ithout this evidentia-ry link, it is unreasonable to conclude that a rational jury could find that Garcia committed [this robbery] with the specific intent to facilitate other gang crimes. There was simply a total failure of proof of the requisite specific intent.”3 Id. at 1104.
The State urges us to disregard Garcia, citing two California appellate court decisions holding that Garcia misinterpreted California law. See People v. Hill, 142 Cal.App.4th 770, 47 Cal.Rptr.3d 875, 877 (2006); People v. Romero, 140 Cal.App.4th 15, 43 Cal.Rptr.3d 862, 865 (2006). Romero and Hill both held that “the specific intent element is satisfied if [the defendant] had the specific intent to ‘promote, [1080] further, or assist’ [a fellow gang member] in [any criminal conduct].” Romero, 43 Cal.Rptr.3d at 866; Hill, 47 Cal.Rptr.3d at 877. The State argues that we are bound by this construction of the statute, under which the gang enhancements are warranted so long as Briceno intended to assist Landin in the commission of the crime and knew that Landin was a gang member.
Although we are ordinarily bound by a state’s highest court’s interpretation of its own statute, see Dimidowich v. Bell & Howell, 803 F.2d 1473, 1482 (9th Cir.1986), none of the post-Garcia cases cited by the State were decided by the California Supreme Court, which has yet to address this issue. This panel would therefore normally be bound by the prior panel’s decision in Garcia, which expressly rejected the same interpretation of § 186.22(b) advanced by the State in this case. The State argues, however, that intervening case law in the lower state courts, i.e., Romero and Hill, has cast doubt on Garcia. “In the absence of a pronouncement by the highest court of a state, the federal courts must follow the decision of the intermediate appellate courts of the state unless there is convincing evidence that the highest court of the state would decide differently.” Owen ex rel. Owen v. United States, 713 F.2d 1461, 1464 (9th Cir.1983) (internal quotation marks omitted); see also In re Watts, 298 F.3d 1077, 1082-83 (9th Cir.2002); Dimidowich, 803 F.2d at 1482. Our task is therefore to determine whether, after Romero and Hill, there remain convincing reasons to believe that the California Supreme Court would hold the sentencing enhancements available under § 186.22(b) inapplicable to Briceno’s case.
To the extent that the California Supreme Court has provided an authoritative interpretation of § 186.22(b), that interpretation suggests that the Court would not adopt the State’s understanding of Romero and Hill. In People v. Gardeley, 14 Cal.4th 605, 59 Cal.Rptr.2d 356, 927 P.2d 713 (1997) (as modified), the California Supreme Court noted that the statute “does not criminalize mere gang membership; rather, it imposes increased criminal penalties only when the criminal conduct is felonious and committed not only ‘for the benefit of, at the direction of, or in association with’ a [gang], but also with the ‘specific intent to promote, further, or assist in any criminal conduct by gang members.’ ” Id. at 725. The court further explained that these “detailed requirements” were designed to ensure that the statute increased punishment only when a defendant “committed a felony to aid or abet criminal conduct of a group that has as a primary function the commission of specified criminal acts and whose members have actually committed specified crimes, and who acted with the specific intent to do so.” Id. at 725 & n. 10 (emphasis added). In contrast to the State’s interpretation of Romero and Hill, Gardeley suggests that merely being a gang member, or committing a crime in association with another gang member, is not enough to trigger the sentencing enhancements of § 186.22(b). Rather, the defendant must commit the crime with the specific intent to aid or abet the criminal conduct of the gang. This is precisely the evidence lacking in Briceno’s case.
Moreover, as this court previously recognized in Garcia, the California Supreme Court’s analysis in Gardeley highlights the type of evidence necessary to sustain gang enhancements under § 186.22(b). In Gardeley, the California Supreme Court found sufficient evidence of gang-related criminal conduct where two gang members severely beat and robbed their victim in full view of neighboring apartment residents. A gang expert testified that such an assault on the gang’s own “turf,” where they had effectively monopolized the drug [1081] trade, was committed to intimidate local residents and dissuade them from reporting the gang’s activities. Id. at 716-18. The court recognized the assault as a “ ‘classic’ example of gang-related activity,” holding that such testimony allowed the jury to reasonably conclude that the assault was committed “with a specific intent to promote, further, or assist in ... criminal conduct by gang members.” Id. at 722.
This theme also runs throughout the other California cases cited by the State, including Romero and Hill. In each case, a jury could reasonably conclude that the defendant committed the crime with the specific intent to benefit the gang, as the defendant either committed the crime to protect gang “turf’ or brandished gang signs or a gang moniker during the attack. See, e.g., People v. Villalobos, 145 Cal.App.4th 310, 51 Cal.Rptr.3d 678, 681 (2007) (crime committed on gang turf); Hill, 47 Cal.Rptr.3d at 876 (defendant announced gang membership); Romero, 43 Cal.Rptr.3d at 864-65 (retaliatory shooting on a rival gang’s turf).4 Here, by contrast, such circumstantial evidence of intent is wholly lacking: the individual robberies were not committed in Hard Times gang territory or on the “turf’ of a rival gang, neither Briceno nor Landin made their gang membership known to the robbery victims, and, indeed, there is no evidence whatsoever of any connection between the gang and the robberies.5
[1082] Finally, even if we were to defer to the post-Garcia decisions of the California Courts of Appeal, not all of those decisions have adopted the expansive reading of § 186.22(b) advanced by the State. In In re Frank S., for example, the State sought gang enhancements based solely on an expert witness’s testimony that the defendant was a gang member and that his criminal conduct would benefit the gang. 46 Cal.Rptr.3d at 841. The Court of Appeal held this evidence insufficient, explaining that while “a trier of fact may rely on expert testimony about gang culture and habits to reach a finding on a gang allegation,” such testimony is insufficient to establish “that a specific individual possessed a specific intent.”6 Id. at 842; see also Killebrew, 126 Cal.Rptr.2d at 886-87. In Briceno’s case, of course, the testimony of a gang expert was all that the State presented to establish specific intent. Thus, even if we were to defer to the state courts’ post-Garcia interpretation of § 186.22(b), it is not at all clear that a gang enhancement could be sustained in this case.
We conclude that on the facts of this case, the California Supreme Court would not hold that there was sufficient evidence to establish a “specific intent to promote, further, or assist in any criminal conduct by gang members,” as required by statute. See Cal. Penal Code § 186.22(b)(1). According to the dissent, however, the California Supreme Court “has already considered and implicitly rejected Brice-no’s argument regarding insufficiency of the evidence!)]” Diss. Op. at 1086.
We disagree. In the state proceedings, both the State and Briceno filed petitions for review with the California Supreme Court. The California Supreme Court granted only the State’s petition for review. That petition related to a separate legal question concerning California’s Three Strikes law. See People v. Briceno, 5 Cal.Rptr.3d 32, 77 P.3d 3 (Cal.2003); Petition for Review, No. S117641, available at 2003 WL 23015606, at *2 (filed July 28, 2003). None of the justices voted to grant Briceno’s petition for review as to the question of whether “the commission of a crime with a fellow gang member, without more, [is] sufficient to prove the crimes were gang related....” See Briceno, 5 Cal.Rptr.3d 32, 77 P.3d at 3; Petition for Review, No. S117641, available at 2003 WL 23015605, at *2. The briefing in the case further demonstrates that the gang enhancements were not before the California Supreme Court, as the parties addressed only the Three Strikes issue. Concluding its opinion on that issue, the court wrote: “In all other respects, the judgment [of Briceno’s conviction] is affirmed.” Briceno, 20 Cal.Rptr.3d 418, 99 P.3d at 1015. Contrary to the reasoning of the dissent, it is unlikely that the California Supreme Court, in a single boilerplate sentence at the end of its opinion on an issue that it decided to review at the behest of one party, intended to express an authoritative view on an issue presented by another party that it had in fact expressly decided not to review. See In re KF Dairies, Inc. & Affiliates, 224 F.3d 922, 925 n. 3 (9th Cir.2000); cf. Trope v. Katz, 11 Cal.4th 274, 45 Cal.Rptr.2d 241, 902 P.2d 259, 268 n. 1 (1995) (“It is well established that our refusal to grant a hearing in a particular case is to be given no weight insofar as it might be deemed that we have acquiesced in the law as enunciated in a published opinion of a Court of Appeal when such opinion is in conflict with the law stated by this [1083] [C]ourt.” (internal quotation marks omitted; emphasis in original)). We think that the portion of the gang enhancement statute requiring specific intent has a plain meaning, that our interpretation is consistent with Garcia and Gardeley, and that the California Supreme Court is likely to conclude that the mere fact that Briceno committed the robberies with another gang member is insufficient to support a gang enhancement under § 186.22(b).
We emphasize that Garcia does not displace the Jackson standard as the proper lens with which we review state-court decisions. This court’s decision in Garcia remains persuasive because it analyzed the only California Supreme Court decision addressing § 186.22(b), i.e., Gardeley, 14 Cal.4th 605, 59 Cal.Rptr.2d 356, 927 P.2d 713, to guide this court’s interpretation of the elements of § 186.22(b). See Garcia, 395 F.3d at 1103-04. Moreover, Garcia interpreted the substantive elements of § 186.22(b) based on legal considerations that remain valid in this appeal, namely, the California Supreme Court’s decision in Gardeley, and the specific-intent language in § 186.22(b), which has not been amended since Gardeley. See Garcia, 395 F.3d at 1103-04. Indeed, the California Supreme Court has not, to date, invalidated this court’s interpretation of § 186.22(b) or otherwise disagreed with Garcia in any decision.
We therefore hold that the appellate court’s conclusion in this case represents an unreasonable application of the Jackson standard, and we grant Briceno’s petition for a writ of habeas corpus as to the sufficiency of the evidence.
CONCLUSION
In view of the foregoing, we affirm in part, reverse in part, and remand for the District Court to grant the habeas petition as to the imposition of the criminal street gang sentence enhancements.
AFFIRMED in part; REVERSED in part; and REMANDED.
Costs are awarded to Petitioner Briceno.