The National Center for Missing and Exploited Children has released new age-progression photos for Andrew, Alexander and Tanner Skelton.
According to the Bryan Times, the center releases new updates every two years when a child is missing, until their 18th birthday. After that, a new picture is released every five years until they are found.
The center claims to have made more than 6,000 age-progression photos over the last 25 years, that have helped successfully identify 1,300 missing children.
John Skelton and his sons were last seen playing in his back yard on Nov. 25, 2010. He was supposed to return them to their mother, Tanya Zuvers, the next morning but no one has seen them since. Early in the investigation, John Skelton made several statements about what happened, but police discredited every one of them.
Skelton is still in prison, serving 15 years for the unlawful confinement of his sons, where he remains uncooperative with the investigation.
Officials say they have reason to believe that just prior to their disappearance, Skelton drove with the boys through Williams County.