Billionaire’s child missing in notorious part of San Francisco

Mint Butterfield is the child of billionaire tech entrepreneur Stewart ButterfieldThe 16-year-old child of a co-founder of the messaging service Slack has gone missing in a notorious neighbourhood of San Francisco.Mint Butterfield, whose dad is billionaire Stewart Butterfield, is thought to be in the Californian city’s Tenderloin area.They were last seen late on Sunday night in Bolinas, a community on the other side of the Golden Gate Bridge from the city, and were reported missing the fol