She "went back" and shot towards her husband and his thirteen year old sons. The two cases are completely different.
No they're not. They're virtually the same thing but with two different results. This woman's husband has a history of violence. She couldn't get away from him and knew that she was in for a beating or something even worse so she did what she thought she had to do because she obviously felt her life was in danger: she shot in his direction but didn't kill him. She got 20 freaking years for that!
George Zimmerman followed an unarmed teenager and ends up killing him because he felt his life was in danger. He walks away a free man.
No two sets of rules here...........