Since Martin has been determined by a jury to have been the attacker,Martin is culpable for Martin’s death.
“No person shall be held to answer for a capital, or otherwise infamous crime, unless on a presentment or indictment of a Grand Jury, except in cases arising in the land or naval forces, or in the Militia, when in actual service in time of War or public danger; nor shall any person be subject for the same offense to be twice put in jeopardy of life or limb; nor shall be compelled in any criminal case to be a witness against himself, nor be deprived of life, liberty, or property, without due process of law; nor shall private property be taken for public use, without just compensation.” (Amendment 5, United States Constitution)
Any further prosecution of Zimmerman relative to the trial whereby he was acquitted would be ”double jeopardy,” criminal, civil, federal or whatever and would be unconstitutional regardless of what lawyers get away with doing now days. Any truthful interpretation of the Constitution is proof positive of that.