Question:  In Plain Sight is a series about the crimes committed by a man who was convicted of murdering how many people?

Context paragraphs:
Major Crimes Act: The Major Crimes Act (U.S. Statutes at Large, 23:385) is a law passed by the United States Congress in 1885 as the final section of the Indian Appropriations Act of that year.  The law places certain crimes under federal jurisdiction if they are committed by a Native American in Native territory.  The law follows the 1817 General Crimes Act, which extended federal jurisdiction to crimes committed in Native territory but did not cover crimes committed by Native Americans against Native Americans.  The Major Crime Act therefore broadened federal jurisdiction in Native territory by extending it to some crimes committed by Native Americans against Native Americans.  The Major Crimes Act was passed by Congress in response to the Supreme Court of the United States's ruling in "Ex parte Crow Dog" (109 U.S. 556 (1883)) that overturned the federal court conviction of Brule Lakota sub-chief Crow Dog for the murder of principal chief Spotted Tail on the Rosebud Indian Reservation.

Prijedor ethnic cleansing: During the Bosnian War, there was an ethnic cleansing campaign committed by the Bosnian Serb political and military leadership mostly against Bosniak civilians in the Prijedor region of Bosnia and Herzegovina.  After the Srebrenica genocide, it is the second largest massacre committed during the Bosnian War.  According to the Sarajevo-based Research and Documentation Center (IDC), around 5,200 Bosniaks and Croats from Prijedor are missing or were killed during the massacre period, and around 14,000 people in the wider region of Prijedor (Pounje).  s of October 2013 , 96 mass graves have been located and around 2,100 victims have been identified, largely by DNA analysis.  The crimes committed in Prijedor have been subjected to 13 trials before the International Criminal Tribunal for the Former Yugoslavia.  Soldiers and police in the Serb SDS, Crisis Staff's, including Milomir Stakic, Milan Kovacevic, Radoslav Brdanin, ranging to the highest leaders including General Ratko Mladic, Bosnian Serb President Radovan Karadzic, and Serbian President Slobodan Milosevic have been charged with genocide, and persecution's, extermination's, murder, forced transfers, and unlawful confinement, torture as Crimes Against Humanity (widespread, systematic attacks against a civilian population) and other crimes, have been alleged to have occurred in Prijedor.  The ICTY has characterized the Prijedor events of 1992 as having met the "actus reus" (guilty act) of genocide through killing members of the group and causing serious bodily and mental harm to members of the group.  However, the requirement of the specific intent to physically destroy having failed to be established beyond reasonable doubt.  However the events of 1992 in Prijedor were part of the larger Joint Criminal Enterprise to forcibly remove Bosnian Muslims and Croats from large territories of Bosnia.  In 2014, investigators were led by two Bosnian Serb civilians who worked in and around the camps to a mass grave at the Tomasica mining complex, unearthing the largest mass grave in Bosnia, and the discovery of over 1,000 bodies in both the Tomasica and Jakarina Rose mass grave sites.

Hiding in Plain Sight: Hiding in Plain Sight is a 2014 novel by Somali novelist Nuruddin Farah.  The novel follows the experience of Bella in the wake of a terrorist attack that kills her brother, Aar, a Kenyan UN worker in Mogadishu.  After the death, Bella returns to Nairobi to help care for her brother's family.  The ensuing conflict between Bella and her brother's widow becomes a central element of the novel.  "Hiding in Plain Sight" is Farah's twelfth novel.

Dora Trial: The Dora Trial, also the "Dora"-Nordhausen or Dachau Dora Proceeding (German: "Dachau-Dora Prozess" ) was a war crimes trial conducted by the United States Army in the aftermath of the collapse of the Third Reich.  It took place between August 7 and December 30, 1947 on the site of the former Dachau concentration camp, Germany.  In the proceedings, officially known as the "United States of America vs. Kurt Andrae et al." (Case 000-50-37), 19 men were accused of war crimes committed in the operation of the Mittelbau-Dora concentration camp, its many subcamps, and the Mittelwerk armaments plant located near Nordhausen, Germany.  The main trial ended with 4 acquittals and 15 convictions, including 1 death sentence.  Dora was the last of a sequence of proceedings which took place in the context of the Dachau Trials relating to wide-ranging war crimes uncovered by the United States in its zone of occupation at the end of World War II.  Those convicted in the Dora Trial served their sentences at Landsberg Prison.

Impeachment in the United States: Impeachment in the United States is an enumerated power of the legislature that allows formal charges to be brought against a civil officer of government for crimes alleged to have been committed.  Most impeachments have concerned alleged crimes committed while in office, though there have been a few cases in which Congress has impeached and convicted officials partly for prior crimes.  The actual trial on such charges, and subsequent removal of an official upon conviction, is separate from the act of impeachment itself.  Impeachment proceedings have been initiated against several presidents of the United States.  Andrew Johnson and Bill Clinton are the only two presidents to have been successfully impeached by the House of Representatives, and both were later acquitted by the Senate.  The impeachment process against Richard Nixon was unsuccessful, as Nixon resigned his office before the vote of the full House for impeachment, but successful in the broader sense of leading to Nixon's departure.  To date, no U.S. President has been removed from office by impeachment and conviction.  The impeached official continues in office until conviction.

Crimes against humanity under Communist regimes: Crimes against humanity have occurred under various communist regimes. Actions such as forced deportation, terror, ethnic cleansing, and the deliberate starvation of people such as during the Holodomor and the Great Leap Forward have been described as crimes against humanity.  In the 2008 Prague Declaration on European Conscience and Communism it was stated that crimes committed under communism were often crimes against humanity, according to the definition developed in the Nuremberg Trials, and that the crimes committed under communism and National Socialism were comparable.  Very few people have been tried for these crimes, although Estonia, Latvia, and Lithuania have passed laws that have led to the prosecution of several perpetrators for crimes against the Baltic peoples.  They were tried for crimes committed during the Occupation of the Baltic states in 1940 and 1941, and during the reoccupation after the war.  There were also trials for attacks by the People's Commissariat for Internal Affairs (NKVD) on the Forest Brethren.

In Plain Sight (UK TV series): In Plain Sight is a Scottish television drama series covering the crimes committed by serial killer Peter Manuel in Lanarkshire, Scotland in the 1950s.  The three-part series was first broadcast on ITV on 7 December 2016.

Offences at Sea Act 1799: The Offences at Sea Act 1799 (39 Geo 3 c 37) is an Act of the Parliament of Great Britain.  It is still in force.  It extended the jurisdiction of British courts to crimes committed by British subjects on the high seas.  It does not apply to foreign citizens.  (However crimes committed by foreigners in British territorial waters, or on board British ships on the high seas, can be prosecuted in British courts.)  Jurisdiction over piracy on the high seas already existed before 1799, whether committed by British subjects or not.

Peter Manuel: Peter Thomas Anthony Manuel (13 March 1927 – 11 July 1958) was an American-Scottish serial killer who was convicted of murdering a total of seven people across Lanarkshire and southern Scotland between 1956 and his arrest in January 1958, and is believed to have murdered two more, nine in all.  Prior to his arrest, the media nicknamed the unidentified killer "the Beast of Birkenshaw".  Manuel was hanged at Glasgow's Barlinnie Prison; he was one of the last prisoners to die on the Barlinnie gallows.

Indictment and arrest of Augusto Pinochet: General Augusto Pinochet was indicted for human rights violations committed in his native Chile by Spanish magistrate Baltasar Garzón on 10 October 1998.  He was arrested in London six days later and held for a year and a half before finally being released by the British government in March 2000.  Authorized to freely return to Chile, Pinochet was there first indicted by judge Juan Guzmán Tapia, and charged with a number of crimes, before dying on 10 December 2006, without having been convicted in any case.  His arrest in London made the front-page of newspapers worldwide as not only did it involve the head of the military dictatorship that ruled Chile between 1973 and 1990, but it was the first time that several European judges applied the principle of universal jurisdiction, declaring themselves competent to judge crimes committed by former heads of state, despite local amnesty laws.

Supporting paragraphs: In Plain Sight (UK TV series) Peter Manuel
Answer: seven