Did an L.A. real estate broker shortchange the citizens of an African nation out of millions?

When the bluff-top mansion at the end of Malibu’s Sweetwater Mesa Road sold for more than $30 million in 2016, it looked like the end of a years-long intrigue involving the playboy son of the president of an oil-rich African nation.

Instead, the sale and a quick flip of the property for nearly…