ids of who is screaming. how has it been going? >> reporter: that 911 emergency call was played more times than i can count this morning before the jury. i watched them so closely. every single time it was played witness after witness i would see them going like this. i would see them going like this. i mean just listening so intently to see if they would hear something. we heard the prosecutor inject with a question was that a continuous scream or did it stop and start. it was obvious the prosecution wants it to be a continuous scream. the defense countered that with having it stop and start. as it kept being played you listen to that. don't forget the nonemergency 911 call was played for the jury too and then the defense asked becau based on the rule of completeness for the whole tape to be played. the focal point was been the jury listening and relistening to every piece of audio tape.