. >> reporter: mark schubert recruited keller to swim for the university of southern california and coached him throughout his olympic career. but following gold medal glory, keller told the olympic channel podcast he struggled to adjust to life after swimming. >> i found the real-world pressure much more intimidating and much more difficult to deal with. >> reporter: he became homeless and lived for a time in his car. >> i think my first thought was, knowing that he has struggled, trying to get a profession, trying to be a successful family man, having suffered from depression and anxiety, you know, all of those things came to mind. and just made me feel very sad. >> oh, that is such a profound statement. when you spoke to klete after the riot, what did you guys say to each other? >> he was very sad, apologized profusely over and over again, like he was apologizing to me for what he had done. and i said, look, klete, you did a bad thing. you're a good person, and you know, i'm here to support you as you know your teammates at usc will be here to support you. >> reporter: keller charged wit