prove beyond a reasonable doubt that george zimmerman did not act in self-defense that night. >> and in the end the jury came to a decision unanimously that they did not meet their burden. still unclear as they neared a decision what happened as zimmerman and trayvon martin wrestled on the ground that night in february 2012. and without that any decision would be difficult. take a listen. >> to prove the crime of manslaughter the state must prove the following two elements beyond a reasonable doubt -- one, trayvon martin is dead. two, george zimmerman intentionally committed an act or acts that caused the death of trayvon martin. george zimmerman cannot be guilty of manslaughter or committing a merely negligent act or if the killing was either justifiable or excusable homicide. >> technically, it could be a debate going on between manslaughter and second degree. it could be a debate going on between manslaughter and an acquittal. >> in the circuit court of the 18th judicial circuit in and for