The Sacco family doesn't know who he is.
Aubrey Sacco, who went missing at age 23, had embraced a life of travel and art.
In one video, she can be seen teaching the hokey pokey dance to kids halfway around the world.
"There's not a day that goes by where we don't think about her, most of the day," Paul Sacco, Aubrey's father, said.
It's been a year and a half of those days since Aubrey Sacco has been seen.
The family has visited Nepal. They've petitioned Secretary of State Hillary Clinton to put State Department investigators on the ground. They've been helped by thousands of supporters on the internet who spread the word and donate to the cause.
They've still come up with nothing - just bits of loose ends. One of them is the photo Paul Sacco found on his daughter's laptop when they picked up her belongings where she left them before her big hike in Nepal.
The man in the photo was in a café in India. Later, he was also seen in the city south of where Aubrey Sacco went hiking.
"Does he know Aubrey? Does he have information that could help us find Aubrey?" Paul Sacco asked. "It's very frustrating that we would be posting his picture, and no one has called us back, recognizing him."
Through all of this, Sacco has turned to music as his therapy. He wrote and produced an album, for sale on iTunes, called "Finding Aubrey."
"It's all so sad. It's hard to listen to. It really is. But it honestly tells the story of what a person goes through when their child goes missing," Paul Sacco said.
For information on how you can help the family continue their search, please go to www.AubreySacco.com.