manner in which the act was committed. See Counterman, supra...”
132 Ariz. at 496, 647 P.2d at 627.
Count III of the indictment charged appellant with only one crime. The indictment was not duplicitous. We find no error.
SECOND-DEGREE MURDER INSTRUCTION
The trial court must instruct on every grade of an offense which evidence presented at trial will support. State v. Moreno, 128 Ariz. 257, 625 P.2d 320 (1981); State v. Contreras, 107 Ariz. 68, 481 P.2d 861 (1971). Appellant asserts the court erred in refusing to instruct the jury on second-degree murder. To support an instruction for second-degree murder, the evidence reasonably construed should tend to show lack of premeditation. State v. Moreno, supra.
A.R.S. § 13-1101(1) defines premeditation:
“‘Premeditation’ means that the defendant acts with either the intention or the knowledge that he will kill another human being, when such intention or knowledge precedes the killing by a length of time to permit reflection. An act is not done with premeditation if it is the instant effect of a sudden quarrel or heat of passion.”
After reviewing appellant’s confession and the other facts presented at trial, we find no evidence that when reasonably construed tends to show the absence of premeditation. We find no error.
GRUESOME PHOTOGRAPHS
Several photographs were admitted at trial despite appellant’s objection that they were so gruesome as to inflame the passions of the jury. If gruesome evidence is admitted for the sole purpose of inflaming the jury, we will reverse on appeal. State v. Steele, 120 Ariz. 462, 586 P.2d 1274 (1978). However, gruesome or inflammatory evidence may be admitted if it is material to some aspect of the case. State v. Steele, supra; State v. Zaerr, 110 Ariz. 585, 521 P.2d 1131 (1974); State v. Thomas, 110 Ariz. 120, 515 P.2d 865 (1973). In such circumstances, the trial court must determine whether the probative value of the evidence outweighs its potential to prejudice the jury. State v. Navarre, 132 Ariz. 480, 647 P.2d 178 (1982); 17A A.R.S. Arizona Rules of Evidence, rule 403.
Photographs can be admitted to aid in identifying the victim, to illustrate how the crime was committed, to aid the jury in understanding testimony, and to show the location of mortal wounds. State v. Navarre, supra; State v. Schad, 129 Ariz. 557, 633 P.2d 366 (1981), cert. denied, 455 U.S. 983, 102 S.Ct. 1492, 71 L.Ed.2d 693 (1982). In the instant case, the photographs showed the body of Scott Schwartz in the alfalfa field where it was found by police officers. While the photographs are admittedly gruesome, we cannot say, after a careful review of the evidence, that the trial court abused its discretion in admitting the photographs. Before trial, counsel stipulated to the identity of the victim but state’s counsel would not stipulate to the cause of death. The photographs could have shown the jury the location of the wounds and illustrated how the crime was committed. Although the medical examiner testified that he did not need the photographs to describe the wounds to the jury, they may have assisted the jury in understanding his testimony, particularly in light of the fact that his descriptions were couched in technical medical terms.
The trial court has discretion to admit or exclude gruesome photographs, and competent evidence will not be excluded simply because it may arouse emotions. State v. Ferrari, 112 Ariz. 324, 541 P.2d 921 (1975). The discretion of the trial court in admitting evidence will not be disturbed on appeal unless it has been clearly abused. State v. Chatman, 109 Ariz. 275, 508 P.2d 739, cert. denied, 414 U.S. 1010, 94 S.Ct. 373, 38 L.Ed.2d 247 (1973). We find no error.
CORPUS DELICTI
Appellant contends the trial court erred in denying his motion for direct