Balloon Boy Investigation

TMZ has learned the Larimer County Sheriff's Department will conduct an investigation into the getaway balloon caper. We're told they have not decided if it's a criminal investigation -- presumably filing a false report.

After a meeting today, Sheriff's officials tell us they will conduct interviews with the family beginning tomorrow, including the boy.

A Sheriff's official told us they will not interview the family today because "their physical and emotional state as of this morning is not well."

Thing is ... they've been doing TV nonstop. We're just sayin' ...