The defendant was indicted on 1 July 1985 for one count of murder and one count of first-degree rape. In August 1985, he was tried capitally and found guilty of the first-degree murder of and attempted first-degree rape of Vanessa Jones. He was sentenced to death for the murder and to twenty years imprisonment for the attempted rape. We found no error in the trial and sentences in State v. Holden, 321 N.C. 125, 362 S.E.2d 513 (1987), cert. denied, 486 U.S. 1061, 100 L. Ed. 2d 935 (1988) (hereinafter Holden I).
In 1989, the defendant filed a Motion for Appropriate Relief in the Superior Court, Duplin County. In December 1990, that court granted partial relief by vacating the defendant’s death sentence and ordering a new capital sentencing proceeding based on the opinion of the Supreme Court of the United States in McKoy v. North Carolina, 494 U.S. 433, 108 L. Ed. 2d 369, on remand, 327 N.C. 31, 394 S.E.2d 426 (1990). At the second capital sentencing proceeding, which is the subject of this appeal, the jury found three aggravating circumstances: that the defendant previously had been convicted of a felony involving the use of violence to the person; that the murder was committed for the purpose of avoiding a lawful arrest; and that the murder was committed while the defendant was attempting to commit a rape. The jury found as a mitigating circumstance that the defendant was under the influence of a mental or emotional disturbance when he committed the murder. It then found that the mitigating circumstance did not outweigh the aggravating circumstances and recommended a sentence of death. The trial court sentenced the defendant to death in accord with that recommendation.
The evidence presented during the defendant’s original trial and capital sentencing proceeding is summarized in Holden I, 321 N.C. at 131-32, 362 S.E.2d at 519-20. The issues presented by this appeal relate only to the defendant’s second capital sentencing proceeding.
The State presented evidence at the second capital sentencing proceeding tending to show that in the late evening of 15 March 1985 or the early morning of 16 March 1985, the defendant was seen sitting in his car outside a disco near Warsaw, North Carolina. At approximately 3:00 a.m., four acquaintances asked him for a ride home. The defendant asked one of them, Johnnie Lee Williams, to find Vanessa Jones, but Williams could not locate her. Williams’ prior testimony during the defendant’s 1985 trial was admitted during this sentencing proceeding because Williams had died subsequent to that trial. The *398defendant drove Williams and two others to Williams’ home, and they all got out of the car. The defendant and Levon Hicks, who was also in the car at the time, then drove away. Williams stated that he had seen the defendant with a .25 caliber pistol in November 1984 and that the defendant had told him that to keep her from talking, he was going to kill the next girl whom he raped.
Levon Hicks testified that he had known the defendant for seven or eight years and that he knew Vanessa Jones. He saw the defendant sitting in his car outside the disco on 15 March 1985. Hicks got in the defendant’s car. Later he saw Johnny Pat Barden and Vanessa Jones walking down the street. Barden asked the defendant to take the two of them home. The defendant agreed, and the four left with the defendant and Hicks in the front seat and Barden and Jones in the back seat.
Hicks further testified that the defendant drove past Jones’ house and that Jones complained that she wanted to go home. The defendant instead drove to Barden’s home. Hicks stated that shortly after they took Barden home, the defendant stopped the car beside the road and told Hicks to get in the back seat. Jones was passed out at this time. Hicks testified that the defendant ordered him to tie some suspenders around Jones’ legs, but Hicks refused.
They then drove on a dirt road and through a little path. Hicks stated that the defendant stopped the car, got in the back seat, and began touching Jones’ chest. Hicks was outside the car at the time. He testified that the defendant was unzipping Jones’ pants and saying he was going to “get some,” but was scared she was going to yell. After twenty minutes the defendant got in the front seat and drove back toward the Warsaw Block Plant. Hicks stated that the defendant told him he was taking him home and that the defendant was going to “get some meat.” The defendant asked Hicks if he wanted any “meat,” and Hicks declined. The defendant stated that after he “got some meat,” he would probably have to kill her so she would not talk. After leaving Hicks at his home, the defendant drove off in the direction of a graveyard.
Henry Sutton discovered the body of Vanessa Jones on a dirt path outside Warsaw. A deputy arrived and identified the body. He noticed a laceration and blood on the victim’s body. He also noticed that the victim’s shirt was not tucked into her pants, that her pants were unbuckled or unzipped, and that one of her shoes was removed. He radioed for the SBI, secured the scene, and covered the body
*399Officers executed a search warrant for the house where the defendant lived. They were looking for a knife, but during the search one of the officers saw a pistol behind the bed. The officer did not seize the weapon because at that time it was not known that Jones had been shot.
Later the same day, an SBI special agent who had observed the body executed a search warrant on the residence and seized a knife, a pair of scissors, a pair of wet jeans found in a washing machine, and another knife found in a car parked in the yard. From another car parked in the yard, the agent seized a red suspender similar to one found near Jones’ body.
After the autopsy revealed that Jones had been shot in addition to her throat having been cut, the SBI agent returned to the scene of the crime and seized a spent cartridge and two unfired bullets. A deputy returned to the defendant’s home to seize the gun, but it was no longer there.
SBI Agent John Payne testified that on 16 March 1985, he saw the defendant in front of his residence. He read the defendant his Miranda rights, which the defendant waived. The defendant then said he wanted to speak with Payne about Jones’ death. The defendant wrote a statement detailing the events on the night of the murder. The defendant also had an interview with Payne in which he stated that he had been fishing with Williams and the defendant’s father on the morning of 16 March 1985 and that upon returning he learned of Jones’ death.
A pathologist who performed the autopsy testified that Jones died of a gunshot wound to the throat. He found no semen in her vagina. A forensic witness testified that the shell casings found at the scene matched the defendant’s gun, which had been retrieved by officers.
The defendant presented the following evidence pertinent to this appeal:
Dr. George Baroff, a clinical psychology professor at the University of North Carolina at Chapel Hill, was accepted by the trial court as an expert in the field of clinical psychology. He examined the defendant on three occasions and reviewed his school records and a Dorothea Dix Hospital evaluation of the defendant. He administered the Stanford-Binet intelligence test to the defendant, who scored a 56. Such a score falls within the mentally retarded range of intellectual *400functioning. In Dr. Baroffs opinion, the defendant was functioning in the mentally retarded range on the date of the offense, even though an I.Q. test showed the defendant’s I.Q. to be 70. He testified that a score of 56 was consistent with other scores achieved by the defendant on other intelligence tests. Dr. Baroff further stated that the defendant had a mental age of ten years. He gave the defendant reading material that a seven-year-old could read without difficulty, but the defendant had difficulty reading it. Dr. Baroff also stated that mental retardation adversely affects a person’s capacity to think about the consequences of his or her behavior because the person has a difficult time understanding “what might be” as opposed to “what is.” Such persons have almost no grasp of the future consequences of actions taken in the present. In Dr. Baroff’s opinion, the defendant was under the influence of a mental or emotional disturbance at the time of the offense.
On cross-examination Dr. Baroff stated that the pattern of the defendant’s responses on the tests suggested that he was not malingering by performing poorly on purpose. Dr. Baroff also conceded that though the defendant’s mental age was nine or ten years, his life experience was greater than that of a ten-year old. He further stated that the defendant was married, operated a vehicle, and had held a job at a poultry factory for ten or twelve years. The defendant had been promoted to assistant manager at the factory. The defendant also had volunteered with a rescue squad but was unable to pass the exam to become a certified Emergency Medical Technician.
Willie Arnette, a friend of the defendant and his co-worker on the rescue squad, testified that the rescue squad is a volunteer organization which met twice a month. He stated that the defendant and he were on the squad for four years.
Dr. Thomas Ryan, a clinical neuropsychologist, was accepted by the trial court as an expert in the field of neuropsychology. He conducted neuropsychological assessments on the defendant on 5 August 1989 for nine hours. Based on tests taken by the defendant and on medical records, Dr. Ryan determined that the defendant suffered from moderate brain damage, which had resulted from a lack of oxygen at the time of the defendant’s birth. He found the defendant’s intellectual functioning to be in the mentally retarded range, and he also concluded that the defendant was not malingering on the tests. Dr. Ryan further stated that the defendant’s scores indicated that he was severely impaired by his brain damage. He testified that the *401impairments were present at the time of the offense, and that at the time of the offense the defendant’s ability to appreciate the criminality of his conduct or to conform his conduct to the requirements of the law was impaired.
Dr. Nancy Earl, a physician, was accepted by the court as an expert in the field of neurology. She testified that she was familiar with the neuropsychological testing performed on the defendant and had reviewed Dr. Ryan’s report. She also had reviewed the defendant’s birth records as well as his mother’s medical records. She stated that the defendant’s neurological impairment could have been caused in part by a lack of oxygen to the brain during his birth. She performed a neurologic exam on the defendant on 4 August 1989 for three hours. Dr. Earl found the defendant to be alert and oriented; he knew who he was, he knew the date, and he understood that she was a doctor.
The mental status examination revealed global impairments, which indicated that both the sides and frontal area of the brain were impaired. The physical examination revealed that the defendant had some abnormal features in his eyes and that the muscle tone in his legs was abnormally increased on both sides, which indicated a motor neuron lesion in the brain.
Dr. Earl further found the defendant’s reflexes to be abnormally brisk. She stated that the defendant was not malingering; rather, he was trying to cooperate during these tests. She concluded that her findings of brain dysfunction were consistent with mental retardation, poor school performance, and the lack of oxygen to his brain at birth. In her opinion, the defendant was under the influence of a mental or emotional disturbance at the time of the offense. She also opined that at the time of the offense, the defendant’s ability to appreciate the criminality of his conduct or to conform his conduct to the requirements of law was impaired.
On cross-examination Dr. Earl testified that she assumed the defendant understood what a gun was and what it meant to pull the trigger of a gun. She also thought the defendant would understand that if he shot a person in the throat with a gun, the person would be hurt. She stated that the defendant probably understood what a knife was and that if he cut a person’s throat with a knife, the person would be injured.
*402Dr. Mark Chandler, an assistant professor and neuropsychiatrist at the University of North Carolina at Chapel Hill, was accepted by the trial court as an expert in the fields of psychiatry, mental retardation, and neuropsychiatry. He had examined the defendant on four different occasions in 1989 and was familiar with the testing performed by Drs. Baroff and Ryan. He concluded that the defendant was mildly mentally retarded and that he did not have any major depressive disorders or psychoses. He further determined that the defendant had organic brain damage and was suffering from a mental or emotional disturbance at the time of the offense. In his opinion, the defendant’s ability to appreciate the criminality of his conduct or to conform his conduct to the requirements of law was impaired at the time of the offense. On cross-examination Dr. Chandler stated that the defendant knows what a pistol is, how to pull the trigger, and probably understands that if you shoot someone, the person will be injured.
[1] The defendant first assigns as error the trial court’s refusal to peremptorily instruct the jury on mitigating circumstances. The defendant argues inter alia in support of this assignment that the evidence supporting the statutory mitigating circumstance that the defendant suffered a mental or emotional disturbance at the time of the murder was uncontroverted. He contends that the trial court therefore should have instructed peremptorily on that mitigating circumstance. N.C.G.S. § 15A-2000(f)(2) (1988). We agree.
The defendant submitted evidence in support of this statutory mitigating circumstance in the form of expert testimony from Dr. George Baroff, a clinical psychologist, Dr. Thomas Ryan, a neuropsychologist, Dr. Mark Chandler, a neuropsychiatry professor, and Dr. Nancy Earl, a neurology professor. Dr. Baroff stated that the defendant’s I.Q. is 56, which is in the mentally retarded range. He further stated that the defendant was under a mental or emotional disturbance at the time of the offense. Dr. Ryan testified that the defendant suffered from moderate organic brain damage. Dr. Chandler testified that the defendant was mildly retarded and had organic brain damage. He further stated that the defendant was under a mental or emo: tional disturbance at the time of the crime. Dr. Earl testified that the defendant’s brain damage was caused by complications at his birth.
The State presented no evidence that controverted the defendant’s evidence on this mitigating circumstance and does not argue that any such evidence was presented. We have held that “[wjhere *403... all of the evidence in [a capital prosecution], if believed, tends to show that a particular mitigating circumstance does exist, the defendant is entitled to a peremptory instruction on that circumstance.” State v. Johnson, 298 N.C. 47, 76, 257 S.E.2d 597, 618 (1979). As the evidence supporting the mitigating circumstance found in N.C.G.S. § 15A-2000(f)(2) was uncontroverted, it was error for the trial court to deny the defendant’s request for a peremptory instruction thereon. Cf. State v. Green, 336 N.C. 142, 172-74, 443 S.E.2d 14, 32 (1994) (peremptory instructions relating to nonstatutory mitigating circumstances differ from those relating to statutory mitigating circumstances).
We cannot conclude that this error was harmless beyond a reasonable doubt. One or more of the jurors found that this statutory mitigating circumstance existed; however, we do not know whether all of the jurors did. Assuming, as we must, that not all jurors found this mitigating circumstance existed, it is possible that had the peremptory instruction been given, more or all would have done so. See State v. Gay, 334 N.C. 467, 492-94, 434 S.E.2d 840, 855 (1993) (determining that failure to instruct peremptorily on uncontroverted, nonstatutory mitigating circumstances could not be held harmless beyond a reasonable doubt because more or all jurors might have found the circumstance if a peremptory instruction had been given). It is reasonably possible that the number of circumstances found by each juror could have had an effect on the juror’s balancing of the mitigating circumstances against the aggravating circumstances, thereby affecting the sentencing recommendation. See id. Therefore, the defendant is entitled to a new capital sentencing proceeding.
The defendant has brought forward additional assignments of error. Although we need not address those assignments in light of our holding that the defendant is entitled to a new capital sentencing proceeding, the issues presented in some of those assignments are almost certain to arise again in any new capital sentencing proceeding the defendant is subjected to. For that reason, we elect to discuss the following additional assignments of error.
[2] The defendant assigns as error the trial court’s submission of the aggravating circumstance that the defendant previously had been convicted of a felony involving the use of violence. N.C.G.S. § 15A-2000(e)(3) (1988). The defendant had been convicted of the felony of attempted second-degree rape against a person other than the victim in the case before us. The court instructed that “attempted *404rape is by definition a felony involving the use of violence to the person.” The defendant contends that no evidence was presented from which the jury could find beyond a reasonable doubt that the attempted second-degree rape involved violence or the threat of violence. He argues that because the State only offered proof of his conviction for second-degree rape by presenting the judgment, it failed to present evidence sufficient to prove the aggravating circumstance beyond a reasonable doubt. He reasons that the conviction is insufficient to prove the use of or threatened use of violence because second-degree rape may be predicated on sexual intercourse with a person who is mentally defective, mentally incapacitated, or physically helpless. N.C.G.S. § 14-27.3(a)(2) (1993). Thus, according to the defendant, the trial court should not have submitted the circumstance based solely on the judgment entered upon the conviction. We do not agree.
The General Assembly of North Carolina has provided that one aggravating circumstance weighing in favor of a sentence of death is that a defendant “had been previously convicted of a felony involving the use or threat of violence to the person.” N.C.G.S. § 15A-2000(e)(3) (1988). The issue in the present case is whether evidence of a defendant’s prior conviction for attempted second-degree rape consisting solely of the judgment against the defendant for that offense satisfies the State’s burden of proving this aggravating circumstance. We conclude that it does.
Under N.C.G.S. § 15A-2000(e)(3), the required prior felony
can be either one which has as an element the involvement of the use or threat of violence to the person, such as rape or armed robbery, State v. Hamlette, 302 N.C. 490, 276 S.E.2d 338 (1981), or a felony which does not have the use or threat of violence to the person as an element, but the use or threat of violence to the person was involved in its commission.
State v. McDougall, 308 N.C. 1, 18, 301 S.E.2d 308, 319, cert. denied, 464 U.S. 865, 78 L. Ed. 2d 173 (1983) (footnote omitted). This Court has concluded that for purposes of N.C.G.S. § 15A-2000(e)(3), rape is a felony which has as an element the use or threat of violence to the person. State v. Artis, 325 N.C. 278, 321, 384 S.E.2d 470, 494 (1989) (quoting McDougall, 308 N.C. at 18, 301 S.E.2d at 319), judgment vacated on other grounds, 494 U.S. 1023, 108 L. Ed. 2d 604, on remand, 327 N.C. 470, 397 S.E.2d 223 (1990)). We have further reasoned that where rape is deemed to have as an element the use or threat of violence, the “felony of attempt to commit rape is therefore *405by nature of the crime a felony which threatens violence.” State v. Green, 336 N.C. 142, 170, 443 S.E.2d 14, 30 (1994) (interpreting military law). Under N.C.G.S. § 15A-2000(e)(3), “[attempting to commit a crime which inherently involves violence obviously constitutes, at least, a ‘threat of violence.’ ” Id. at 169, 443 S.E.2d at 30. Therefore, the judgment showing that the defendant had previously been convicted of attempted second-degree rape was sufficient, standing alone, to require that the trial court submit the aggravating circumstance that the defendant had committed a prior felony involving the use or threat of violence to the person.
For purposes of applying this aggravating circumstance, we reject the notion of any felony which may properly be deemed “nonviolent rape.” We believe that a more enlightened view of this matter has been expressed in the opinions of military courts which have been cited with approval by this Court.
Under the Uniform Code of Military Justice, rape is always, and under any circumstances, deemed as a matter of law to be a crime of violence. United States v. Bell, 25 M.J. 676 (A.C.M.R. 1987), rev. denied, 27 M.J. 161 (C.M.A. 1988); United States v. Myers, 22 M.J. 649 (A.C.M.R. 1986), rev. denied, 23 M.J. 399 (C.M.A. 1987). As stated in Myers, military courts “specifically reject the oxymoronic term of ‘non-violent rape.’ The more enlightened view is that rape is always a crime of violence, no matter what the circumstances of its commission.” Myers, 22 M.J. at 650. “Among common misconceptions about rape is that it is a sexual act rather than a crime of violence.” United States v. Hammond, 17 M.J. 218, 220 n.3 (C.M.A. 1984).
Green, 336 N.C. at 169, 443 S.E.2d at 30. We conclude, for similar reasons, that the crime of attempted rape always involves at least a “threat of violence” within the meaning of N.C.G.S. § 15A-2000(e)(3).
It is true that dicta in McDougall supports the existence of both “non-violent” rape and “non-violent” attempted rape under North Carolina law. McDougall, 308 N.C. at 18 n.1, 301 S.E.2d at 319 n.1. More recently, however, we have emphasized the fact that such language in McDougall was mere dicta when we declined to “consider whether there is a non-violent crime of attempted rape under North Carolina law.” Green, 336 N.C. at 170, 443 S.E.2d at-. The defendant suggests that his prior conviction for attempted second-degree rape under N.C.G.S. § 14-27.3 could have been for having sexual intercourse with a person who was mentally defective, mentally incapaci*406tated, or physically helpless. N.C.G.S. § 14-27.3(a)(2) (1993). He would therefore have us conclude that it has not been established that violence or a threat of violence accompanied the defendant’s prior offense of attempted second-degree rape. We do not agree.
The acts of having or attempting to have sexual intercourse with another person who is mentally defective or incapacitated and statutorily deemed incapable of consenting — -just as with a person who refuses to consent — involve the “use or threat of violence to the person” within the meaning of N.C.G.S. § 15A-2000(e)(3). In this context, the force inherent to having sexual intercourse with a person who is deemed by law to be unable to consent is sufficient to amount to “violence” as contemplated by the General Assembly in this statutory aggravating circumstance. Likewise, the attempt to have sexual intercourse with such a person inherently includes a threat of force sufficient to amount to a “threat of violence” within the meaning of this aggravating circumstance.
Nor do we believe that having or attempting to have sexual intercourse with a “physically helpless” person in violation of N.C.G.S. § 14-27.3(a)(2) may properly be deemed “non-violent” rape or attempted rape. We find no merit in the suggestion that N.C.G.S. § 14-27.3(a)(2) makes it a crime to have consensual sexual intercourse with a physically helpless person. For purposes of this discussion only, we accept the questionable proposition that the legislature could, consistent with the Constitution of the United States, make consensual sexual intercourse with a physically helpless person a felony. But cf. Bowers v. Hardwick, 478 U.S. 186, 92 L. Ed. 2d 140 (rejecting any fundamental right of homosexuals to engage in acts of consensual sodomy, but implying that consensual sex acts between heterosexual adults ordinarily will be viewed as constitutionally protected). Nevertheless, we conclude that the legislature intended no such result and that the statute only prohibits having or attempting to have sexual intercourse with a physically helpless person who does not consent thereto. Such acts of having or attempting to have sexual intercourse with a physically helpless person who does not consent inherently include force or a threat of force sufficient to rise to the level of “the use or threat of violence” contemplated in the aggravating circumstance set forth as N.C.G.S. § 15A-2000(e)(3).
For the foregoing reasons, we conclude that the prior judgment against the defendant for attempted second-degree rape, standing alone, was sufficient evidence to require that the trial court submit *407the statutory aggravating circumstance that the defendant previously had been convicted of a felony “involving the use or threat of violence to the person.” Therefore, the trial court properly submitted this statutory aggravating circumstance for the jury’s consideration during the defendant’s capital sentencing proceeding.
[3] The defendant also assigns as error the trial court’s failure to submit the statutory mitigating circumstance of the defendant’s age at the time of the crime. See N.C.G.S. § 15A-2000(f)(7). The defendant was thirty-years-old at the time of the offense. He argues that there was substantial evidence to support the circumstance and that the trial court had to submit it, despite his withdrawal of his request that it be submitted. We conclude that the evidence supported the circumstance, and the trial court erred in failing to submit it to the jury.
In support of this mitigating circumstance, the defendant elicited the testimony of Dr. Baroff, who stated that, based on a series of tests, he had formed the opinion that the defendant’s mental age was ten years. He further stated that the defendant performed better on easier parts of the tests than he did on the more difficult parts, which is a pattern consistent with valid and honest responses by a test-taker. Dr. Baroff testified that on the date of the offense the defendant’s intellectual functioning was in the mentally retarded range, which was consistent with another I.Q. test that the defendant had taken in 1989. On cross-examination Dr. Baroff conceded that the defendant had more life experience than a ten-year-old child, but on redirect he explained that the defendant’s problem-solving skills were closer to those of a ten-year-old than to those of a person who was in his thirties.
We have characterized “age” as a “flexible and relative concept.” State v. Johnson, 317 N.C. 343, 393, 346 S.E.2d 596, 624 (1986). We also have noted that “the chronological age of a defendant is not the determinative factor under G.S. § 15A-2000(f)(7).” State v. Oliver, 309 N.C. 326, 372, 307 S.E.2d 304, 333 (1983). Here, the defendant was thirty-years old at the time of the offense; however, the testimony of Dr. Baroff that the defendant’s mental age was ten years and that his problem-solving skills were closer to those of a ten-year-old was substantial evidence from which a juror or jurors reasonably could find that the defendant’s age at the time of the offense was mitigating. Therefore, regardless of the defendant’s wishes about the matter, the trial court had an independent duty to submit the statutory mitigating circumstance based on the evidence. See N.C.G.S. § 15A-2000(b) *408(1988); State v. Brown, 315 N.C. 40, 62, 337 S.E.2d 808, 824-25 (1985), cert. denied, 476 U.S. 1165, 90 L. Ed. 2d 733 (1986), overruled on other grounds by State v. Vandiver, 321 N.C. 570, 364 S.E.2d 373 (1988).
For the reasons stated, the defendant is entitled to a new capital sentencing proceeding.
NEW CAPITAL SENTENCING PROCEEDING.