WHEN an electronic gun designed to immobilise but not kill emerged from the pages of science fiction and went into manufacture a decade ago, police forces around the world snapped it up.

• 十年前，在科幻小说的书页出现一款中弹便令人动弹不得，而非结束其本人性命（并可生产）的高压电击枪的时候，世界各地警方便采取抢先行动。