Read the 911 transcript or listen to the audio.
http://www.documentcloud.org/documents/326700-full-transcript-zimmerman.html
Here's an interactive map as well (1st video in step 1)
http://www.hlntv.com/interactive/2013/06/17/zimmerman-trayvon-map-interactive
The map doesn't show at the end that Zimmerman replied "Ok" to the dispatcher's instructions of not following Martin. This is a common misconception by the public that Zimmerman followed anyway and didn't listen to the dispatcher. The map is still pretty good in visualizing what happened but it left out that key piece at the end.
With the audio and no proof that goes against Zimmerman's story of what happened, I think the jury made the right decision.
I recommend everyone does their own research instead of jumping to conclusions based on their emotions.
There's zero evidence that shows this. The dispatcher asked Zimmerman "Is he white, black, or Hispanic?". Zimmerman replies "He looks black".
That's it!