[ inaudible ]. reporter: the recording is difficult to hear but also captures the moment when slager and a senior officer talk about what happens to him next. waited a couple days to interview, official interview. go home, probably a good idea to kind of shut down go over thoughts of what happened. adrenaline pumps. pumping, oh yeah. reporter: the south carolina law enforcement kwigs in charge of the investigation characterized the audio as information that was discussed at the scene. they tell cnn their investigation is ongoing. everyone at the seen being interviewed. no more! no more! reporter: meanwhile, the actions of the second police officer seen responding to the shooting are being scrutinized. the national bar association a group of predemocrat nanltly african-american lawyers and judges say officer claires