Earlier Thursday, crews had been searching an area near the Dumbarton Bridge where Odell's car was found.
The California Highway Patrol, police and Odell's friends joined the search efforts on Wednesday at a nearby wildlife refuge.
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"It's been a tough year for us nurses, so we're really trying to band together, pool our resources and you know use our skills to try to bring our friend home safely," said John Leblanc, Odell's friend.
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