Stand your ground is why he was found innocent.
What the heck, just a few
Zimmerman to argue self-defense, won't seek stand-your-ground hearing - CNN.com
Zimmerman gambles by waiving 'stand your ground' hearing before trial - U.S. News
George Zimmerman Waives 'Stand Your Ground' Hearing and Heads to Trial - ABC News
Zimmerman never waived stand your ground. The defense was reserved not waived.