I found this perusing through the court minutes. I thought it interesting to see the initial theory from the State and Detective Flores with the gun shot to the head being the first wound. I recommend reading the entire document as it is very informative as to the charges:
CR2008-031021-001 DT
08/18/2009
Cruelty
SUPERIOR COURT OF ARIZONA MARICOPA COUNTY
A first degree murder is “especially cruel” if the victim suffers physical pain or mental
anguish and the defendant knew or should have known that the victim would suffer. State v.
McCray, 218 Ariz. 252, 259, ¶31, 183 P.3d 503, 510 (2008). To establish this aggravating factor, the State does not need to prove that the victim was conscious for “each and every wound inflicted.” State v. Sansing, 206 Ariz. 232, 235, ¶10, 77 P.3d 30, 34 (2003). Physical pain may be found where a conscious victim physically suffered for at least a short period of time. State v. William Herrera, Jr., 176 Ariz. 21, 859 P.2d 131 (1993) (finding victim was lying on the ground with a gash in his head for at least 18 seconds and possibly as much as two to three minutes).
The State presented evidence that the victim was first shot on the right side of his head near his eye with a .25 caliber handgun and that the bullet lodged in his left cheek. This wound was not fatal and may or may not have rendered the victim unconscious. The victim did not remain unconscious based on the infliction of the other wounds and the location of blood spatter evidence in the bathroom sink and blood in the hallway. In addition, the defendant told the police that the victim was unconscious after being shot but then crawled around and was stabbed.
The victim was then stabbed 27 times in the back, shoulders, head and chest. Cuts on the hands were defensive wounds from grabbing the knife. With the exception of two wounds, these wounds were not fatal. The two fatal wounds were a deep stab wound to the chest and then a cut across the throat. While conscious, the victim would have felt pain and mental anguish associated with these multiple wounds.
The Court finds that the State has proved that there is probable cause to believe that the offense was especially cruel under the theory that it involved both physical and mental suffering of the victim.
http://www.courtminutes.maricopa.gov/docs/Criminal/082009/m3846408.pdf