paula newton reports his arrest was decades in the making. >> reporter: one of the most wanted, suspecteddy in his hungarian home land, more than 60 years after his alleged crimes. hungarian prosecutors say he was arrested and has been charged with war crimes. authorities say during world war ii, he helped organize deportation of thousands of jews to oush wits. they allege he regularly tortured them with a dog's whip. historians say for decades they meticulously documented his crimes. >> according to survivors' testimonies, he was notoriously ruthless, cruel commander, very often it happened that he tortured and beat the victims. >> reporter: and yet for almost 15 years now, he was living in his native hungary before they brought the case. it was not a manhunt. they say after decades of living in canada, raising a family, working as an art dealer, he emgrated here in 1949. it was not until the 1990s as jewish groups presented evidence to the authorities he was accused of lying about his past. he left for there in 1997 he was stripped of citizenship saying he lied on the application but wa