SF Chron Editor Phil Bronstein was preparing to be interviewed by Fox News when he overheard a tip that a caretaker was arrested in the murder of Daniel Horowitz’s wife, according to mediabistro.com. A producer at Fox heard the same thing, and when the camera went on, the anchor asked Bronstein about the tip. He told the audience what he knew, and Fox turned it into a story — without checking it. Twenty minutes later, Fox had to retract the story.