The opulent lifestyle of the Andrade family was as spectacular as the economic collapse of the country they left behind.

Venezuelan immigrants, the family lived in a mansion in Florida surrounded by show horses, as neighbors peeked over the property line in awe. The family patriarch, Alejandro Andrade, had been a bodyguard of President Hugo Chávez before rising to powerful positions in his government.

This month, Mr. Andrade will be known for something else: On Nov. 27, he is expected to be sentenced for taking bribes as Venezuela’s treasurer, in a money-laundering scheme that made him a billionaire.

Venezuela is facing its worst economic crisis in modern history. Inflation and devastating shortages of food and medicine have forced more than three million people to flee the country, according to the United Nations.