According to the author Jane Kramer , in 1980 he had been found guilty of statutory rape in an incident involving his daughters .
Convicted of possession of a pipe bomb and conspiracy to possess and make destructive devices , Kirk received a 46 - month prison sentence .
According to the author Jane Kramer , in 1980 Kirk had been found guilty of statutory rape in an incident involving Kirk 's daughters .
Convicted of possession of a pipe bomb and conspiracy to possess and make destructive devices , Kirk received a 46 - month prison sentence .