FBI and ATF Investigate BIA Officer's Crimes
He lied to the FBI about the assault.
He drove the girl to a secluded park to avoid cameras before assaulting her.
He attempted to set his patrol vehicle on fire.
FBI DNA analysis showed 99,000 times higher likelihood of Deela's DNA.
ATF confirmed the fire was intentional.
U.S. Marshals took Deela into custody after the hearing.
Prosecutors recommended 17.5 years, but charge could be life.
FBI is investigating another victim.
Northern Cheyenne tribal council banned Deela from the reservation.