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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UPS driver Dan Partyka delivers an overnight package. As more people buy more goods online, the rapid and unrelenting expansion of e-commerce is causing real challenges for the Sandy-Springs based company. (Bob Andres/AJC 2022)

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