Two years earlier, in May 1990, McCandless graduates with high honors from Emory University, but is shown to have become disenchanted with modern society after discovering he and his sister Carine were born out of wedlock when his father was married to another woman. Shortly afterwards, he rejects his conventional life by destroying all of his credit cards and identification documents. He donates nearly all of his savings to Oxfam and sets out on a cross-country drive in his Datsun 210 to experience life in the wilderness. McCandless does not tell his parents, Walt and Billie, nor Carine what he is doing or where he is going and refuses to keep in touch with them after his departure, causing his parents to become increasingly anxious and eventually desperate.