Here's some more. It seems that murdering in the course of agrravated child abuse is chargeable as 1st degree murder but premeditated murder is a different kind of first degree murder. Although casey is charged with aggravated child abuse as well as first degree murder, she was charged with first degree murder under subsection 1 (a) 1, which is by premeditation, NOT by aggravated child abuse:
"782.04 Murder.--
(1)(a) The unlawful killing of a human being:
1. When perpetrated from a premeditated design to effect the death of the person killed or any human being;
2. When committed by a person engaged in the perpetration of, or in the attempt to perpetrate, any:
a. Trafficking offense prohibited by s. 893.135(1),
b. Arson,
c. Sexual battery,
d. Robbery,
e. Burglary,
f. Kidnapping,
g. Escape,
h. Aggravated child abuse,
i. Aggravated abuse of an elderly person or disabled adult,
j. Aircraft piracy,
k. Unlawful throwing, placing, or discharging of a destructive device or bomb,
l. Carjacking,
m. Home-invasion robbery,
n. Aggravated stalking,
o. Murder of another human being,
p. Resisting an officer with violence to his or her person,
q. Felony that is an act of terrorism or is in furtherance of an act of terrorism; or
3. Which resulted from the unlawful distribution of any substance controlled under s. 893.03(1), cocaine as described in s. 893.03(2)(a)4., or opium or any synthetic or natural salt, compound, derivative, or preparation of opium by a person 18 years of age or older, when such drug is proven to be the proximate cause of the death of the user,
is murder in the first degree and constitutes a capital felony, punishable as provided in s. 775.082."
http://www.miami-criminal-lawyer.net/html/homicide-murder.html