Question: The Shipman Inquiry was a report into the activities of the serial killer who was found guilty of how many murders?

full_context: Document 1: Dennis Nilsen: Dennis Andrew Nilsen (born 23 November 1945) is a Scottish serial killer and necrophiliac, also known as the Muswell Hill Murderer and the Kindly Killer, who murdered at least 12 young men in a series of killings committed between 1978 and 1983 in London, England. Convicted of six counts of murder and two of attempted murder at the Old Bailey, Nilsen was sentenced to life imprisonment on 4 November 1983, with a recommendation that he serve a minimum of 25 years. He is currently incarcerated at HMP Full Sutton maximum security prison in Full Sutton in the East Riding of Yorkshire, England.
Document 2: Charles Cullen: Charles Edmund Cullen (born February 22, 1960) is a former nurse who is the most prolific serial killer in New Jersey history and is suspected to be the most prolific serial killer in American history. He confessed to authorities that he killed up to 40 patients during the course of his 16-year nursing career. But in subsequent interviews with police, psychiatric professionals, and journalists Charles Graeber and Steve Kroft, it became clear that he had killed many more, whom he could not specifically remember by name, though he could often remember details of their case. Experts have estimated that Charles Cullen may ultimately be responsible for 400 deaths, which would make him the most prolific serial killer in American history.
Document 3: Caroline Swift: Dame Caroline Jane Swift, Lady Openshaw {'1': ", '2': ", '3': ", '4': "} (born 30 May 1955), styled The Hon. Mrs Justice Swift, was leading counsel to the Inquiry in the Shipman Inquiry, which began in 2001.
Document 4: Ashley Smith inquest: The Ashley Smith inquest was an Ontario coroner's inquest into the death of Ashley Smith, a teenager who died by self-inflicted strangulation on 19 October 2007 while under suicide watch in custody at the Grand Valley Institution for Women. Despite guards watching her on video monitors, Smith was able to strangle herself with a strip of cloth, and it was 45 minutes before guards or supervisors entered her cell and confirmed her death. The warden and deputy warden were fired after the incident; although the four guards and supervisors in immediate contact with Smith were initially charged with negligent homicide, those charges were withdrawn a year later. Smith's family brought a lawsuit against the Correctional Service of Canada (CSC) for negligence; this lawsuit was settled out of court in May 2011.
Document 5: Harold Shipman: Harold Frederick Shipman (14 January 1946 – 13 January 2004) was a British general practitioner and one of the most prolific serial killers in recorded history. On 31 January 2000, a jury found Shipman guilty of fifteen murders for killing patients under his care. He was sentenced to life imprisonment with the recommendation that he never be released.
Document 6: Kathleen Marshall (solicitor): Kathleen Anne Marshall (born 4 June 1953) is a British solicitor and legal scholar, specialising in child law. From 1989 to 1994, she was director of the Scottish Child Law Centre. From 2004 to 2009, she was Scotland's Commissioner for Children and Young People. She has been involved in a number of inquiries into child abuse: she chaired the Edinburgh Inquiry into Abuse and Protection of Children in Care (report produced in 1999) and she chaired the Independent Inquiry into Child Sexual Exploitation in Northern Ireland (report produced in 2014).
Document 7: Fred West: Frederick Walter Stephen West (29 September 1941 – 1 January 1995) was an English serial killer who committed at least 12 murders between 1967 and 1987 in Gloucestershire, the majority with his second wife, Rosemary West.
Document 8: Thayne Forbes: Sir John Thayne Forbes (born June 1938) is a retired British judge and barrister. As a High Court judge, he presided over the trial of Harold Shipman who was convicted of 15 murders in 2000 and subsequently sentenced to life imprisonment. Shipman is now recognised as one of the most prolific serial killers in history. He led the Al-Sweady Inquiry, a five-year public enquiry that reported in 2014.
Document 9: John Bodkin Adams: John Bodkin Adams (21 January 1899 – 4 July 1983) was a British general practitioner, convicted fraudster and suspected serial killer. Between 1946 and 1956, more than 160 of his patients died in suspicious circumstances. Of these, 132 left him money or items in their wills. He was tried and acquitted for the murder of one patient in 1957. Another count of murder was withdrawn by the prosecution in what was later described as "an abuse of process" by the presiding judge Patrick Devlin, causing questions to be asked in Parliament about the prosecution's handling of events. The trial was featured in headlines around the world and was described at the time as "one of the greatest murder trials of all time" and "murder trial of the century". It was also described at the time as "unique" because, in the words of the judge, "the act of murder" had "to be proved by expert evidence."
Document 10: Janet Smith (judge): Dame Janet Hilary Smith, DBE (born 29 November 1940), styled The Rt Hon. Lady Justice Smith, is an English judge and former High Court Judge and President of the Council of The Inns of Court. She is perhaps best known as the judge who prepared "The Shipman Inquiry", a report on the activities of the British serial killer Harold Shipman. On 21 November 2002, Smith became the fourth woman to be promoted to the Court of Appeal, but has since retired from that role.
Document 11: Janet Leach (appropriate adult): Janet Leach is an English social worker, known for the role she played as appropriate adult in the questioning of Fred West, one of the two perpetrators of the Gloucester serial murders, for which he and his wife Rosemary West (against whom Leach testified at trial) became notorious. The murders, first committed by Fred before he met Rosemary, and then by the two of them as co-conspirators, included the kidnapping, rape, torture, and murder of various young women, including their own children and stepchildren. Fred committed suicide in his cell while on remand on New Year's Day, 1995; Rosemary was convicted and became one of three women in Britain to be handed a whole life tariff (the others being Myra Hindley and, in 2014, Joanne Dennehy).
Document 12: Bloody Sunday Inquiry: The Bloody Sunday Inquiry, also known as the Saville Inquiry or the Saville Report after its chairman, Lord Saville of Newdigate, was established in 1998 by British Prime Minister Tony Blair after campaigns for a second inquiry by families of those killed and injured in Derry on Bloody Sunday during the peak of ethno-political violence known as The Troubles. It was published on 15 June 2010. The inquiry was set up to establish a definitive version of the events of Sunday 30 January 1972, superseding the tribunal set up under Lord Widgery that had reported on 19 April 1972, 11 weeks after the events, and to resolve the accusations of a whitewash that had surrounded it.
Document 13: Harold Shipman: Doctor Death: Harold Shipman: Doctor Death is a 2002 ITV television drama about the life and crimes of serial killer Harold Shipman. Starring James Bolam in the role of Shipman, the programme was directed by Roger Bamford and written by Michael Eaton. Broadcast on July 9, 2002, the programme attracted a viewing audience of 7.37 million. The programme was released on DVD on July 15, 2013 by Strawberry Media, in association with ITV.
Document 14: The Shipman Inquiry: The Shipman Inquiry was the report produced by a British governmental investigation into the activities of general practitioner and serial killer Harold Shipman. Shipman was caught in 1998 and the inquiry commenced after his trial in 2000. It released its findings in various stages, with its sixth and final report being released on 27 January 2005. It was chaired by Dame Janet Smith DBE.
Document 15: Al-Sweady Inquiry: The Al-Sweady Inquiry was a five-year public inquiry led by Thayne Forbes which investigated accusations of mistreatment of prisoners by the British Army following the Battle of Danny Boy. The enquiry commenced its investigations in 2009.
ground_truth: fifteen