Bones found in the Northern California foothills have been identified as belonging to a Swedish exchange student who went missing more than 33 years ago, prompting police investigators to reopen the case, a newspaper reported on Tuesday. The remains, consisting of only seven bones, were discovered in Fremont, California, in 2010 and in November were matched to 21-year-old Elisabeth Martinsson, the Marin Independent Journal reported on its website. Martinsson had been staying as an exchange student with a family in Greenbrae, across the San Francisco Bay from Fremont, when she was reported missing on Jan. 17, 1982. She vanished after buying a pair of boots in the nearby community of Larkspur and had not been seen in the more than three decades since.