Prosecutors build case against balloon hoax family

US investigators pored over emails, phone records and financial documents from the home of Richard Heene as they weighed felony charges and sought to determine who else might have helped the alleged balloon-boy hoax get off the ground.

The sheriff's office said its findings will be forwarded to prosecutors next week to decide if Richard and Mayumi Heene should be charged with falsely reporting that their six-year-old child had drifted away in a large home-built helium balloon to drum up publicity for a reality TV show.