Zimmerman was arrested for resisting arrest in 2005 also had domestic violence case in the same year. Trayvon was suspected by some people as having a violent past based on facebook posts and/or twitter feeds
When you read the ex fiances account of Zimmermans behavior its not out of character for him to have intiated a confrontation he ended up on the losing end of.
In fact given the previous documented cases of zimmermans violence, given that Austin Brown saw him laying on the ground but didnt mention martin on top of him, its equally plausable, He assalted Martin, got his ass kicked when Martin backed off he shot him.
That would coincide with Austin Browns account,
"an eyewitness, 13-year-old Austin Brown, told police he saw a man fitting Zimmerman's description lying on the grass moaning and crying for help just seconds before he heard the gunshot that killed Martin."
No mention of Martin on top of him.
"The woman said she offered to drop the papers off the following day, but
Zimmerman became upset, took her cellphone and shoved her. A fight ensued, she said, and her dog bit Zimmerman's cheek."
I wonder if thats why Trayvon's call with his girlfriend was interrupted?
http://articles.orlandosentinel.com...ce-20120321_1_petitions-documents-injunctions