If the Prosecution didn't call the cops and such as fact witnesses, the Defense Attorneys would have done so, elicited the same favorable testimony, and slammed the prosecutors for "hiding" them from the jury. Any testimony by cops about anything Zimmerman might have said could only be admitted if the prosecution asked for it or let the defense do so, or Zimmerman agreed to take the stand. Had the prosecutor not asked such questions, the defense could not have done so without allowing the prosecutor to cross-examine Zimmerman.
Any testimony by cops about anything Zimmerman might have said could only be admitted if the prosecution asked for it or let the defense do so, or Zimmerman agreed to take the stand. Had the prosecutor not asked such questions, the defense could not have done so without allowing the prosecutor to cross-examine Zimmerman. Really? The 5th Amendment doesn't apply in Florida?
That was not an "opening the door" issue. You have the right to remain silent and the right to call witnesses on your behalf.