CHICAGO (WLS) -- The CEO of Exelon Utilities has retired abruptly with no explanation.
Anne Pramaggiore's departure Tuesday comes as the Chicago-based energy company was recently dragged into the ongoing FBI investigation into State Senator Martin Sandoval. Last month, the FBI raided Sandoval's offices and home.
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Exelon revealed in a federal filing late last week that it is cooperating with investigators.
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Pramaggiore is being replaced by Calvin G. Butler Jr., CEO of the Baltimore Gas and Electric Company, which is part of the Exelon family.
