The 16-year-old daughter of billionaire Slack co-founder Stewart Butterfield vanished and is feared to be in one of San Francisco’s most notoriously dangerous neighborhoods. Mint Butterfield, 16, was last seen at 10 p.
A billionaire businessman’s teenaged child is missing and may be in San Francisco’s Tenderloin neighborhood, authorities said. Mint Butterfield, 16, was last seen late Sunday night in Bolinas, the Marin County Sheriff’s Office said.