Wednesday marks the fourth anniversary of Kyron Horman's disappearance.
Kyron was 7 when he vanished from his Portland, Oregon, school on June 4, 2010. A massive search came up empty, and no arrests have been made.
The boy was driven to school that day by his stepmother, Terri Horman. She told authorities she last saw him walking down the hall toward his classroom at about 8:45 a.m. Nobody saw him after that.
Kyron's biological mother, Desiree Young, said in a Facebook message Wednesday she will never stop looking for him, and a private search will be conducted June 20, 21 and 22.