Crews had been searching for Rosenthal, an experience hiker, after he did not return from a hike as planned on Sept. 24. Authorities said Rosenthal was first reported missing on Sunday afternoon.
The Culver City resident is known for brokering deals to sell historic downtown office and industrial buildings for conversion into condominium or apartment buildings.
He also has a reputation for writing short, humorous poems and reading them aloud at public events.
The Associated Press contributed to this report.
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