Kenyan woman killed in Dubai: what's with the assault charge?

I remain very confused by this system of justice!

A man described in news reports only as "a 24-year-old Emirati" or by his initials "A.A.G" beat a young Kenyan woman unconscious in a parking lot in Dubai. She had defended her friend who he or one of his buddies had sexually assaulted, and for this, he punched her to the ground and kicked her repeatedly in the head.She fell into a coma and later died of her injuries.

The confusing part is that this amorphous, nameless man is to be charged merely with "assault leading to death", and not with murder.

According to one news report, "when asked whether the suspect had any intention to kill the victim, the prosecutor said it is a case of beating which led to death and "not a premeditated murder"."

Herein lies the reason for my confusion: is a beating that leads to death not also a murder? We're talking about the taking of a life here! how does that boil down to assault? Outrageous!