Secret California City Led by Ex-Goldman Trader Faces Scrutiny

The mystery surrounding a project to convert farmland into a new green city in California is finally being unraveled. The would-be “mega-city” is the brainchild of a novice developer backed by some of Silicon Valley’s most prominent names.

But despite the heavyweights behind the project, it has already been embroiled in legal tussles and is being greeted by suspicion from talkative neighbors in and around Fairfield, a city in Solano County about 50 miles (80 kilometers) northeast of San Francisco.

On Friday, the New York Times reported that more than 100 unexplained land purchases by an entity called Flannery Associates ...