Sean Penn's Latest Passion

Chris's sister Carine, who helped Sean Penn write narration for Into the Wild, says her brother was a breed apart. "I think that Chris was someone who didn't waste his life wondering what other people would think of him. He lived his life wondering what he would think about himself," she says.

While some people say that Chris was searching for himself, Carine says that's not true. "Chris knew exactly who he was," she says. "He was searching for a place in this world that he fit into, where he could be true to himself. He was searching for truth, purity, honesty. He was searching for the things that he didn't experience in his childhood."