They contacted Facebook, which at the time dominated the social media landscape, asking for help scouring uploaded family photos - to see if Lucy was in any of them. But Facebook, despite having facial recognition technology, said it "did not have the tools" to help.
One user Alastair, or Eret, who hosts a server on the platform with more than 60,000 users, told the BBC simply, "I do not trust them."
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这些志愿者，主要由Sun Health基金会和Banner Health协调，2018年的数据显示，两家医院的志愿者累计捐赠了177030小时的服务时间，是Banner Health在亚利桑那州18家医院中，志愿者数量和服务时间最多的。
“We will continue to investigate,” she added.