A Los Angeles Police Department source told People that the cause of death is unclear.

Although Gesser didn't have a character named after him in "Wolf on Wall Street," the former hedge-fund manager served as an advisor to Belfort in real life. He also served as a consultant to director Martin Scorsese and actor Jonah Hill in the 2013 film.

"Wolf of Wall Street" starred Leonardo DiCaprio as Jordan Belfort, an infamous stockbroker involved in the "pump and dump" fraud scheme.

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George Olmstead helped found Blackshaw Olmstead, which became Blackshaw, Olmstead, Lynch, and Konig LLC. He then pivoted to Olmstead, Lynch and Curtis before retiring after being diagnosed with Alzheimer's. (Courtesy Olmstead family)

Credit: Olmstead Family

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Lt. Gov. Burt Jones — pictured at an August rally in Peachtree City that also featured Vice President JD Vance — appears to have scored another legal victory over gubernatorial rival Attorney General Chris Carr in their battle over campaign finance issues. (Arvin Temkar/AJC 2025)

Credit: Arvin Temkar / AJC