Mint Butterfield, the child of divorced tech billionaires Caterina Fake and Stuart Butterfield, was found safe, six days after they were initially reported missing.

Fake and Butterfield co-founded Flickr before their divorce. Butterfield is also the founder and former CEO of Slack, while Fake previously served as the chairwoman of Etsy.

Mint, 16, was last seen at a bus stop 30 miles northeast of San Francisco on April 21. The teenager lives with their mother and attends boarding school in the Napa area. 

Mint's parents and stepfather, Jyri Engestrom, released a joint statement Sunday thanking the Marin County Sheriff's Office, the San Francisco Police Department, and the other law enforcement agencies of the Bay Area for assisting in the search for Mint.

When Mint was initially reported missing, police said they were searching for the teenager in San Francisco's Tenderloin area. The Tenderloin area is known for high-rates of crime and drug use, and is the center of the city's fentanyl epidemic.

"It appears there may be a substance abuse history" in Mint's case, Sgt. Adam Schermerhorn, a spokesperson for the Marin County Sheriff's Office, told SFGATE.

"The last seven days have been terrifying," the family's statement read. "We are painfully aware that people die of overdoses every day in this city and we are lucky to have had the support of seasoned police officers who understand the very real threat of predators who use the allure of drugs to groom teenagers."