Here is how jury selection works. The jurors first fill out questionnaires that the lawyers get to review, then the judge asks preliminary questions, the state asks their questions, and then the defense asks questions. A major topic is going to be who heard pretrial publicity. So while Potential Juror 1 may not have heard the tapes, Potential Juror 2 may have and will then say "well I heard she said this about jurors, and I think she is a witch." Suddenly PJ1, who had no position agrees with PJ2 and asserts his agreement when asked if anyone else agrees with PJ2. Now both jurors would be stricken for cause, as they would have exhibited a bias against the defense team. Now once this will likely become a heated topic, and suddenly PJ5, PJ7, PJ14, etc all express the same bias - and they all too are excluded. Now the State is left with PJ3, PJ4, PJ6, PJ9, PJ9, etc who all said they understood the context of what was said and why it was said and they stay in the jury pool because they have not expressed a bias against the defense, nor by saying they understand the context of the statements are the expressing a sympathy for the defense that the State could use to strike them for cause. So basically, once this questioning is done. All of the shoot now, sort 'em out later people are off the jury and you are left with more level headed people. Now, once the jury is seated with a pro-defense jury, the statements will never be discussed again. Also, the entire audio of her speech would not be played for any reason, even during jury selection. Rather, the only exposure during jury selection would be what people remember hearing.