The prosecutors specifically argued that child abuse happened in this case[1]:
Prosecutor Richard Mantei argued that instructions for third-degree murder should be included on the premise that Zimmerman committed child abuse when he fatally shot 17-year-old Trayvon Martin because Martin was underage.
Prosecutor Richard Mantei argued that instructions for third-degree murder should be included on the premise that Zimmerman committed child abuse when he fatally shot 17-year-old Trayvon Martin because Martin was underage.
[1] http://tampa.cbslocal.com/2013/07/11/judge-rules-jury-can-co...