Zimmerman Trial: Innocent of 2nd degree murder? Did the State lose the case already?

The answer is simple. In order to win a conviction on second-degree murder, the prosecution had to prove beyond a reasonable doubt that George Zimmerman's conduct revealed "a depraved mind" without regard for human life. It has failed to do so.
The problem with the prosecution's case is that there was never enough evidence to prove that George Zimmerman shot Trayvon Martin "because he wanted to," as prosecutor John Guy claimed at the beginning of the trial.
What makes matters even more complicated is that the state's witnesses weren't able to shine a coherent light on the events that preceded the shooting on the night of February 26, 2012.
"There are significant weaknesses in the state's case — most importantly conflicting eyewitness accounts which themselves create reasonable doubt as to what happened that night," said Elizabeth Parker, a former Florida prosecutor.
Even worse, some of the prosecution's key witnesses gave testimony that damaged the state's case. John Good, a resident of the Florida community where the shooting took place, gave testimony that would suggest that Martin had the upper hand in the struggle that occurred before Zimmerman took out his gun.

http://www.policymic.com/articles/53117/george-zimmerman-trial-it-s-only-halftime-but-the-trial-is-already-over