NEW : Falcon Heene says `` we did this for the show , '' authorities say case genuine . The FBI is investigating a possible hate crime after an alleged white supremacist allegedly shot and killed two black men in separate incidents on Saturday. Sibling said boy untethered balloon and climbed in , but no one was found aboard . There was no box attached when the balloon landed at 1:35 p.m. Authorities launched ground and air searches for boy after balloon landed .
NEW : Falcon Heene says `` we did this for the show , '' authorities say case genuine . The FBI is investigating a possible hate crime after an alleged white supremacist allegedly shot and killed two black men in separate incidents on Saturday. Sibling said boy untethered balloon and climbed in , but no one was found aboard . Authorities launched ground and air searches for boy after balloon landed .