 Shipman claimed that she was an addict, and showed them comments he had written to that effect in his computerised medical journal; however, examination of his computer showed that they were written after her death.Shipman was arrested on 7 September 1998, and was found to own a Brother typewriter of the kind used to make the forged will.The police then investigated other deaths Shipman had certified, and created a list of fifteen specimen cases to investigate.