In other words, Martin would need to have been killed by somebody other than Zimmerman, while Zimmerman was engaged in "aggravated stalking." And Martin would not need to have been the target of the stalking.
This provision is so that when a person is killed during commission of another crime, and the perpetrator is not the one who killed the victim, he can still be charged with the murder.
See how confusing it is?
I can’t figure out how Corey arrived at the charge.