Dr. Harold Shipman was convicted of murdering 15 patients through lethal injections of diamorphine. Concerns were first raised about the high death rate of his elderly female patients. His last victim, Kathleen Grundy, left her entire estate of £386,000 to Shipman in a forged will. Shipman's arrest and conviction uncovered a pattern of administering lethal doses to patients and forging medical records. He was found guilty and sentenced to 15 life sentences. Shipman later committed suicide in his prison cell in 2004.