Opinion
A defendant convicted of first degree murder with at least one special circumstance found true will be sentenced to either death or life *572 imprisonment without the possibility of parole. (Pen. Code, § 190.2; all further statutory references are to this code.) One of these special circumstances is the felony-murder special circumstance under which a murder occurred during the commission or attempted commission, or the immediate flight after commission, of one of eleven specified felonies. (§ 190.2, subd. (a)(17)(i-xi).) A felony-murder special circumstance is applicable to a defendant who is not the actual killer if the defendant, either with the “intent to kill” (§ 190.2, subd. (c)), or “with reckless indifference to human life and as a major participant, aids, abets, counsels, commands, induces, solicits, requests, or assists in the commission of [one of the eleven enumerated felonies].” (§ 190.2, subd. (d), italics added [hereafter 190.2(d)].)
We granted review in this case to resolve a conflict in the Courts of Appeal over whether a trial court has a sua sponte duty to define the phrase “reckless indifference to human life” when instructing a jury regarding a felony-murder special-circumstance allegation against a defendant who is not the actual killer. We conclude that because a common understanding of the phrase “reckless indifference to human life” amply conveys the meaning of section 190.2(d), a trial court is not required, in the absence of a request, to further explain the statutory phrase to the jury. The Court of Appeal in this case reached a similar conclusion. We therefore affirm the judgment of the Court of Appeal.
Background
Police officers were summoned to the El Monte home of Rudolph Jaime, where they found the house ransacked and Mr. Jaime lying in a pool of blood on the living room floor. The victim was alive but gravely injured from multiple cuts and stab wounds to his chest, neck, and head. He died from his injuries shortly after the officers arrived.
Defendant Michael Siqueros and a codefendant, Conrad Estrada, were present in Jaime’s home and were immediately taken into custody. They were jointly charged in a three-count information with first degree murder, robbery, and burglary. Two felony-murder special circumstances were alleged, namely, (1) that the murder occurred during the commission of a robbery, and (2) that the murder occurred during the course of a burglary. It was also alleged, as to each count, that defendant and Estrada personally used a weapon in the commission of the offense. Finally, as to defendant only, an allegation was made that he suffered two prior serious felony convictions.
Defendant and Estrada were tried jointly before a jury. At trial, evidence was introduced that defendant was not the actual killer. In light of this *573 evidence, when instructing the jury on the two felony-murder special-circumstance allegations, the trial court gave the portion of CALJIC No. 8.80.1 that tracks the language of section 190.2, subdivisions (c) and (d), pertaining to accomplice liability. The jury was charged as follows: “If you find that a defendant was not the actual killer of a human being, or if you are unable to decide whether the defendant was the actual killer or an aider and abettor, you cannot find the special circumstance to be true as to that defendant unless you are satisfied beyond a reasonable doubt that such defendant with the intent to kill aided, abetted, counseled, commanded, induced, solicited, requested or assisted any actor in the commission of the murder in the first degree, or with reckless indifference to human life and as a major participant aided, abetted, counseled, commanded, induced, solicited, requested or assisted in the commission of the crime of Penal Code section 190, subdivision (a), subdivision (17), which resulted in the death of a human being, namely, Rudolph Jaime.” (Italics added.) The trial court gave no further instructions defining “reckless indifference to human life.”
Following deliberations, the jury found both defendants guilty of first degree murder, robbery, and burglary. The jury also found true, as to each defendant, the special circumstance allegations that the murder of Jaime was committed while defendants were engaged in the robbery and burglary of the victim’s home. Consistent with the prosecution’s version of the evidence, the jury found true the allegations that Estrada personally used a knife during the commission of each offense, but found the same allegations not true as to defendant.
Both defendants were sentenced to life without the possibility of parole, with consecutive midterm sentences for the robbery and burglary convictions stayed pursuant to section 654. In addition, the court imposed on defendant a restitution fine of $5,000, and a consecutive sentence of 10 years, having found true the allegation that defendant suffered 2 prior serious felony convictions.
Defendant and Estrada jointly appealed their convictions and sentences on numerous grounds. Rejecting all contentions, the Court of Appeal unanimously affirmed the judgments.
In the portion of its opinion relevant to the issue presented here, the Court of Appeal held that the trial court had no sua sponte duty to define the phrase “reckless indifference to human life.” Noting that defendant failed to request an explanatory instruction, the court found no trial court error. In so holding, the court expressly disagreed with the conclusion reached in
People
v.
Purcell
(1993)
*574 We granted defendant’s petition for review in order to resolve this conflict in the decisions of the Courts of Appeal.
Discussion
In a criminal case, a trial court has a duty to instruct the jury on “ ‘ “ ‘the general principles of law relevant to the issues raised by the evidence.’ ” ’ ”
(People
v.
Kimble
(1988)
As we explained in
People
v.
Poggi
(1988)
The rule to be applied in determining whether the meaning of a statute is adequately conveyed by its express terms is well established. When a word or phrase “ ‘is commonly understood by those familiar with the English language and is not used in a technical sense peculiar to the law, the court is not required to give an instruction as to its meaning in the absence of a request.’”
(People
v.
Rowland
(1992)
The jury in this case was instructed in the language of section 190.2(d). This provision was added to existing capital sentencing law in 1990 as a result of the passage of the initiative measure Proposition 115, which, in relevant part, eliminated the former, judicially imposed requirement that a jury find intent to kill in order to sustain a felony-murder special-circumstance allegation against a defendant who was not the actual killer.
(Purcell, supra,
The portion of the statutory language of section 190.2(d) at issue here derives verbatim from the United States Supreme Court’s decision in
Tison
v.
Arizona
(1987)
Tison
was concerned with whether imposition of the
death penalty
on an accomplice to a felony murder who neither killed nor intended to kill the victim would violate the Eighth or Fourteenth Amendments. The decision itself does not stand for the proposition that imposition of a penalty less severe than death, such as life imprisonment without parole, would offend constitutional principles in the absence of proof of “reckless indifference to human life.” (Cf.
Rosenberg
v.
Henderson
(E.D.N.Y. 1990)
The defendants in Tison were two brothers sentenced to death for their involvement in the roadside kidnapping, robbery, and murder of a family of four. At trial, it was established that the defendants orchestrated the prison escape of their father and his cellmate, arming themselves, a third brother, and the two convicted murderers with guns while still inside prison walls, and assisting in the escapees’ flight after the breakout. When a tire on the group’s getaway car went flat on the highway, one of the defendants flagged down a passing motorist for help. Both of the defendants participated in the kidnapping and robbery of the occupants of the stopped vehicle, and were nearby when their father and his cellmate shot and killed the four victims. (Tison, supra, 481 U.S. at pp. 139-141 [95 L.Ed.2d at pp. 132-134].)
Relying on
Enmundv. Florida
(1982)
In the high court’s view, “some nonintentional murderers may be among the most dangerous and inhumane of all—the person who tortures another not caring whether the victim lives or dies, or the robber who shoots someone in the course of the robbery, utterly indifferent to the fact that the desire to rob may have the unintended consequence of killing the victim as well as taking the victim’s property. This reckless indifference to the value of human life may be every bit as shocking to the moral sense as an ‘intent to kill.’ ” (
Finding support in the Model Penal Code, which equates reckless killing with intentional killing for purposes of classifying various types of homicide, the court in
Tison
concluded that “the reckless disregard for human life
*577
implicit in knowingly engaging in criminal activities known to carry a grave risk of death represents a highly culpable mental state.” (
Tison
thus instructs that the culpable mental state of “reckless indifference to life” is one in which the defendant “knowingly engag[es] in criminal activities known to carry a grave risk of death” (
Relying on the court’s holding in Purcell, supra,
We disagree and find that, when considered in its entirety—as the phrase is presented to the jury—“reckless indifference to human life” is commonly understood to mean that the defendant was subjectively aware that his or her participation in the felony involved a grave risk of death. The common meaning of the term “indifference,” referring to “the state of being indifferent,” is that which is “regarded as being of no significant importance or value.” (Webster’s New Intemat. Diet. (3d ed. 1981) p. 1151, col. 1.) To regard something, even to regard it as worthless, is to be aware of it. (See id. at p. 1911, col. 1 [“regard” is synonymous with “consider, evaluate, judge”].)
Although the term “reckless”—standing alone—may arguably be understood in common parlance to mean simply neglectful, heedless, or rash (see Webster’s New Intemat. Diet., supra, at p. 1896, col. 1), when the word is placed in context within the statutory phrase “indifference to human life,” what is conveyed to the jury is more than mere negligence.
*578
The conclusion that in common parlance, the phrase “reckless indifference to human life” conveys the notion of a subjective appreciation or knowledge by the defendant of a grave risk of death is further supported by our decision in
People
v.
Dellinger
(1989)
In reaching our conclusion in
Dellinger, supra,
we noted that the word “disregard” has been defined as describing the situation in which a lack of attention is “intentional or willful.” (
Consistent with our decision in
Dellinger,
we conclude the generally accepted meaning of the phrase, “reckless indifference to human life,” in common parlance amply conveys to the jury the requirement of a defendant’s subjective awareness of the grave risk to human life created by his or her participation in the underlying felony. This is the meaning intended by the phrase “reckless indifference to human life” as it is used in section 190.2(d), and as defined in
Tison.
The phrase therefore does not have a technical meaning peculiar to the law, and the trial court had no sua sponte duty to further define the statutory phrase for the jury. Indeed, by expressly declining to “delineate the particular types of conduct and states of mind
*579
warranting imposition of the death penalty”
(Tison, supra,
We note that following the Court of Appeal’s decision in
Purcell, supra,
According to the court in
Purcell,
from which the language of the clarifying instruction derives, “the
Tison
court intended the phrase ‘reckless indifference to human life’ to refer to a mental state which includes subjective appreciation, or knowledge, by the defendant that the defendant’s acts involved an
extreme likelihood
that such acts could result in the death of an innocent human being.”
(Purcell, supra,
In fact,
Tison
sets forth various descriptions of the life-threatening risk of which a defendant who knowingly participates in criminal activities must be subjectively aware in order for imposition of the death penalty to be constitutionally permissible. (See
Tison, supra,
481 U.S. at pp. 149 [
The question remains what language should replace the standard instruction’s present reference to an “extreme likelihood” of risk. In light of the intent of the voters to incorporate Tison's holding into section 190.2(d) (see
Tapia, supra,
Thus, we find that in the event a request for clarification of the phrase “reckless indifference to human life” is granted, the present reference in CALJIC No. 8.80.1 to an “extreme likelihood” of risk to innocent life should be replaced with the language from Tison concerning a “grave” risk of death.
Defendant further contends that in the absence of further definition by this court, the phrase “reckless indifference to human life” is too vague to comport with federal and state constitutional guarantees of due process and proscriptions against cruel and/or unusual punishment. The record in this case discloses, however, that defendant asserts these claims for the first time in his opening brief in this court, and he fails to make any attempt to show that they are “fairly included” in the issue on which his petition for review was granted. (See Cal. Rules of Court, rule 29.3(c).) Under these circumstances, defendant’s vagueness challenge is not properly before the court and we could decline to address it. (Cal. Rules of Court, rule 28(e)(2); cf.
In re
*581
Matthew C.
(1993)
Having concluded that, absent a request, the court is not required to clarify for the jury the phrase “reckless indifference to human life,” we further reject defendant’s additional contention that, without some limiting instruction, the statutory phrase is unconstitutionally vague. In determining whether a statute is sufficiently certain to comport with due process standards, the court will “look first to the language of the statute, then to its legislative history, and finally to California decisions construing the statutory language.”
(Pryor
v.
Municipal Court
(1979)
We have determined that, viewing the statutory language as a whole, the common understanding of the phrase “reckless indifference to human life” conveys the notion that a defendant subjectively appreciated that his or her conduct created a grave risk of death. Because the ordinary meaning of the statutory phrase amply communicates the parameters of the mental state subjecting a defendant to a sentence of death or lifelong incarceration—as articulated in Tison—the statute is sufficiently certain. (Cf.
Martin
v.
State
(1977)
Conclusion and Disposition
We find the statutory phrase “reckless indifference to human life” is commonly understood to mean that a defendant subjectively appreciated that his or her conduct created a grave risk to human life, and thus conveys the meaning of section 190.2(d), as derived from Tison. In light of this determination, we hold that the trial court had no sua sponte duty to further explain the statutory phrase for the jury.
*582 The judgment of the Court of Appeal is affirmed.
Mosk, J., Kennard, J., Arabian, J., Baxter, J., George, J., and Werdegar, J., concurred.
