As an attorney, I have no idea what "legally white" or "legally Caucasian" means, but I would like to know--if you don't mind explaining.
What we DO know, however, is that:
1. GZ's mother, Gladys, is from Lima, Peru.
2. GZ's maternal great-grandfather was Afro-Peruvian, thus making GZ at least partially black, if only to a minor degree.
3. GZ's father is a white American of German descent.
4. GZ is a registered Democrat in Seminole County and his voter registration records lists him as "Hispanic."
Now, which part of what I just said makes him "legally white" or "legally Caucasian"?
Secondly, what does Zimmerman's race or Trayvon's race have anything to do with what transpired the night Trayvon died?
Here is GZ's voter registration information from 2002 (sorry if it's hard to see):