The search for a missing Portland boy has been called off. Now investigators are turning their attention to a criminal investigation.

Kyron Horman vanished on June 4th. His step-mother Terri Horman took him to Skyline School's science fair.
She says when she left, Kyron was walking towrads his classrom.
With still no sign of the seven-year-old, the majority of searchers are heading home.