Presumably his place was taken by another juror who really believes that the police arrest people completely at random.)
Presumably he had his place taken by a juror who believes police arrest people randomly and with disregard for the law.
mnli hypothesis: Presumably he had his place taken by a juror who believes police arrest people randomly and with disregard for the law. premise: Presumably his place was taken by another juror who really believes that the police arrest people completely at random.)