Billionaire heiress, 16, vanishes in 'San Francisco's notorious Tenderloin neighborhood': Dad is co-founder of messaging app Slack dailym.ai - 2024-04-25T04:56:09.000Z The 16-year-old daughter of a billionaire tech CEO has vanished and is believed to be in San Francisco's gritty Tenderloin neighborhood. tags: dailymail news California Crime Homelessness Full Article More News More from dailym.ai