Let's give the prosecutors in this case the benefit of the doubt. They have a duty to actually present the case to the best of their ability based upon the facts they have. They took their time arresting Zimmerman so they must think they have a pretty good case against Zimmerman.
http://sa18.state.fl.us/general/duties.htm
A jury could still find him innocent or a judge could dismiss the case.
Let's just wait and see if the system works.
Prosecutor's ethics (3.8)--
http://www.law.cornell.edu/ethics/fl/narr/ http://www.law.cornell.edu/ethics/fl..._3.HTM#3.8:300