Judge found the defendant had committed the offense of interfering with a flight crew . A federal judge in Amarillo , Texas , made the determination Tuesday after a psychologist testified that pilot Clayton Frederick Osbon `` suffered from a severe mental disease or defect that impaired his ability '' to understand his actions . She found him not guilty by reason of insanity ; he was sent to a low - security prison . Clayton Frederick Osbon began behaving erratically during a March 27 flight . He was attacked by passengers and the flight was diverted to Amarillo , Texas .
Judge found the defendant had committed the offense of interfering with a flight crew . She found him not guilty by reason of insanity ; he was sent to a low - security prison . Clayton Frederick Osbon began behaving erratically during a March 27 flight . He was attacked by passengers and the flight was diverted to Amarillo , Texas .