Utah statute for "Aggravated Murder"
http://law.justia.com/utah/codes/title76/76_05028.html
What sections I believe may apply here:
(1) Criminal homicide constitutes aggravated murder if the actor intentionally or knowingly causes the death of another under any of the following circumstances:
(d) the homicide was committed incident to an act, scheme, course of conduct, or criminal episode during which the actor committed or attempted to commit aggravated robbery, robbery, rape, rape of a child, object rape, object rape of a child, forcible sodomy, sodomy upon a child, forcible sexual abuse, sexual abuse of a child, aggravated sexual abuse of a child, child abuse as defined in Subsection 76-5-109(2)(a), or aggravated sexual assault, aggravated arson, arson, aggravated burglary, burglary, aggravated kidnapping, kidnapping, or child kidnapping;
(e) the homicide was committed incident to one act, scheme, course of conduct, or criminal episode during which the actor committed the crime of abuse or desecration of a dead human body as defined in Subsection 76-9-704(2)(e);
(p) the homicide was committed by means of the administration of a poison or of any lethal substance or of any substance administered in a lethal amount, dosage, or quantity;
(r) the homicide was committed in an especially heinous, atrocious, cruel, or exceptionally depraved manner, any of which must be demonstrated by physical torture, serious physical abuse, or serious bodily injury of the victim before death; or
(s) the actor dismembers, mutilates, or disfigures the victim's body, whether before or after death, in a manner demonstrating the actor's depravity of mind.