Cold case revived 14 years after teen goes missing in California

New tips continue to emerge years after Daniel Yuen disappeared from a controversial San Bernardino boarding school in 2004.
2:09 | 01/17/19

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Transcript for Cold case revived 14 years after teen goes missing in California
So he'd sit in the sense that it's a case that haunted retired LAPD officer and private investigator Keith Ramon I don't have award for other than. It's discouraging for decades he spent his career tracking down missing children has helped find more than 300. Then. There's Daniel human we never found him missing since February of 2004. Daniel ran away from a controversial boarding school. And the San Bernardino Mountains when he was sixteen the school since shut down. In the months following Daniel's disappearance clues led Raymond in the family. To Hilltop park and ranch open escudos search dogs located his sent eyewitnesses said they'd seen. We've had several sightings in the last Tony four hours. Then for fourteen long years nothing either Raymond nor the family getting so much as a phone call the search effort called off. But last month on an old phone lines Raymond used for business a message lighting up the machine. Atlas for most of our message. And it's theory a Daniel the end is a lines. He's living in the same area and Daniel is does not want contacted only now. Raymond says he just had to come back to the pour keep brought his wife. And sure enough. In with than five minutes of being here somebody said. I've seen that person forty feminists ago. It was Sosa real we've all looked at each other. It's hot again. The center for missing and exploited children even coming up with a new age progressed photo of what you'll might look like today aged thirty hour. I. Or. Are breaking today we spoke to Daniel's parents and sister my face time. They look at new Jersey's main the last sixteen years have been agonizing different. I'll. How do. You. Very much we cannot. After dating now speaking about. And for the investigator who says fourteen years later he's still wakes up in the night thinking. The case will never give up.

This transcript has been automatically generated and may not be 100% accurate.

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