She's known as Mexico's most powerful woman, and she's currently sitting in prison. Elba Esther Gordillo was arrested on corruption charges last night after landing near Mexico City in a private plane, reports the AP. It's things like private planes that appear to be the problem: The 68-year-old heads the country's 1.5 million-member teachers' union, which the BBC describes as Latin America's most powerful union, and prosecutors accuse her of embezzling more than $150 million from its funds to fund a lavish lifestyle of planes, $17,000 of plastic surgery, and designer clothing.