it was my father who called me that night and told me that that cathy was no longer with us. reporter: what was that like for you? it hurts. it still hurts. reporter: so many years later, charles carlisle still smarts from the loss of his big sister cathy, just never got over it. but then, cathy was also his mentor, his protector perhaps his only true friend. they grew up on mcdill airforce base near tampa, florida charles painfully shy, cathy, outgoing, strikingly attractive, popular. tanya vanatter and julie lynn cox were school chums. they remember what a knock-out she was but that there was more to her than just that. she could have her choice of young men. she was beautiful. inside and out. it wasn t just her exterior beauty. she was a beautiful girl, but she just had such a sweet, kind, caring personality that it was attractive to everybody.