Frederick Wiseman died Monday at 96. The prolific, Boston-born filmmaker made roughly 50 documentaries. His most famous — or infamous — film was one of his first. In 1967, he released "Titicut Follies." It was about life inside a correctional facility in Bridgewater, Massachusetts, where inmates had varying degrees of mental illness. Wiseman's film was so controversial, it was banned from public screenings for more than two decades.