The investigation took officials to a property in a mountainous, heavily wooded area where they found the white BMW and Atre's body.
Investigators are tracking multiple suspects in connection with the kidnapping of Atre.
“We are looking into all aspects of his life,” said Sgt Brian Cleveland, a spokesman for the Sheriff's Office. “All doors are open.” Investigators don't know the suspects' relationship with Atre. But authorities “have reason to believe the motive was robbery,” according to the Sheriff's Office's Facebook post.
According to his social media profiles, Atre was an avid surfer. His Instagram profile depicts an adventurous, nature-filled life. His Twitter profile reads: “Surfer.
Mushroom forager. Always on the go.” On Wednesday afternoon, the office confirmed the body found was identified as Atre. “We have reason to believe the motive was robbery,” a sheriff's office statement on Facebook said.
Police are looking for at least two people in connection with the case, the local station KTVU reported on Tuesday.