his grandfather, linda's dad, john chakalos. a multimillionaire real estate and nursing home developer. >> he was like a father to me. and i know i was like a son to him. >> reporter: they ate dinner together regularly at grandpa's house and there were even numerous take your grandson to work experiences when chakalos carted young nathan to business meetings with his associate pat goggins. >> i got the feeling that john had a very good relationship with him and was trying to cultivate that. nathan was as introverted as john was extroverted. >> reporter: not surprisingly, that introverted personality trait did not go over big at middletown high school, where classmates recall him being mocked. but he did have one close friend. a beautiful white horse named cruise. lucky you, having your own horse. >> yes, i was fortunate in that regard and i was able to really form a strong bond emotionally. >> reporter: but when nathan was 17, cruise died and nathan's fragile world fell apart. shortly after cruise died, you ran away from home.as