He says he isn't seeking vengeance on those who tortured and killed his father. Nor does he intend to hate them forever. The only thing Minoru Kariya wants is the simple truth about how exactly his father, Kiyoshi, died nearly 20 years ago.

That would seem to be a modest request, coming from a man whose father was violently abducted and then drugged into unconsciousness. Adding to the indignity, after the Tokyo notary died his remains were reduced to ashes in a microwave-powered incinerator.

This crime has come to be known as the "Kariya Incident" and takes its place among Aum Shinrikyo's long list of transgressions. Experts say it is emblematic of the doomsday cult's savagery.