General Discussion
In reply to the discussion: Juror B37 's Husband who is an Attorney Knows Mark O' Mara (Zimmerman's Defense Lawyer) [View all]Spazito
(50,327 posts)"The doctrine of collateral estoppel, a common law legacy codified by Ashe v. Swenson 397 U.S. 436 (1970), protects criminal defendants from being tried for the same issue in more than one criminal trial. In Ashe v. Swenson, the Court ruled that the aegis of the Fifth Amendment's protections against double jeopardy are enforceable in state as well as federal court through the Due Process Clause of the Fourteenth Amendment as established by Benton v. Maryland 395 U.S. 784. This decision relies on the application of the Full Faith and Credit Clause of the Constitution."
http://www.law.cornell.edu/wex/collateral_estoppel
By ruling collateral estoppel didn't apply, it allowed the State to bring in evidence of conspiracy as part of the re-trial of the murder charge, in effect, negating the acquittal and, instead tying conspiracy as part of the murder.