Question: Rosemary Pauline "Rose" West, is a British serial killer, now an inmate at HMP Low Newton, Brasside, Durham, after being convicted of ten murders in 1995, her husband, named what,an English serial killer who committed at least 12 murders between 1967 and 1987 in Gloucestershire, the majority with his wife, committed suicide in prison while awaiting trial ?

full_context: Document 1: Raymond Fernandez and Martha Beck: Raymond Martinez Fernandez (December 17, 1914 – March 8, 1951) and Martha Jule Beck (May 6, 1920 – March 8, 1951) were an American serial killer couple. They are believed to have killed as many as 20 women during their murderous spree between 1947 and 1949. After their arrest and trial for serial murder in 1949, they became known as "The Lonely Hearts Killers" for meeting their unsuspecting victims through lonely hearts ads. A number of films and television shows are based on this case.
Document 2: Susan Atkins: Susan Denise Atkins (May 7, 1948 September 24, 2009) was a convicted American murderer who was a member of Charles Manson's "Family". Manson and his followers committed a series of nine murders at four locations in California, over a period of five weeks in the summer of 1969. Known within the Manson family as Sadie Mae Glutz or Sexy Sadie, Atkins was convicted for her participation in eight of these killings, including the most notorious, the "Tate/LaBianca" murders. She was sentenced to death, which was subsequently commuted to life in prison. Atkins was incarcerated from October 1, 1969, until her death – a period exactly one week short of 40 years. At the time of her death, Atkins was California's longest-serving female inmate.
Document 3: Rosemary West: Rosemary Pauline "Rose" West ("née" Letts; born 29 November 1953) is a British serial killer, now an inmate at HMP Low Newton, Brasside, Durham, after being convicted of ten murders in 1995. Her husband Fred, who committed suicide in prison while awaiting trial, is believed to have collaborated with her in the torture and murder of at least nine young women between 1973 and 1987, whereas Rose was judged to have murdered her 8-year-old stepdaughter, Charmaine, in 1971. The majority of these murders were committed at the couple's home, 25 Cromwell Street in Gloucester, England.
Document 4: 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 5: Charles Starkweather: Charles Raymond "Charlie" Starkweather (November 24, 1938 – June 25, 1959) was an American teenaged spree killer who murdered eleven people in the states of Nebraska and Wyoming in a two-month murder spree between December 1957 and January 1958. All but one of Starkweather's victims were killed between January 21 and January 29, 1958, the date of his arrest. During the murders committed in 1958, Starkweather was accompanied by his 14-year-old girlfriend, Caril Ann Fugate.
Document 6: Karla Homolka: Karla Leanne Homolka (born 4 May 1970), also known as Karla Leanne Teale and Leanne Bordelais, is a Canadian serial killer who, with her first husband Paul Bernardo, raped and murdered at least three minors. She attracted worldwide media attention when she was convicted of manslaughter following a plea bargain in the 1991 and 1992 rape-murders of two Ontario teenage girls, Leslie Mahaffy and Kristen French, as well as the rape and death of her sister Tammy.
Document 7: Murder of Kitty Genovese: In the early hours of March 13, 1964, 28-year-old American bar manager Kitty Genovese was stabbed to death outside her apartment building in Kew Gardens, a neighborhood in the New York City borough of Queens. 28-year-old Manhattan native Winston Moseley was arrested during a house burglary six days later and, while in custody, confessed to killing her. At his trial, he was found guilty of murder and sentenced to death; this sentence was later reduced to life imprisonment. Moseley died in prison on March 28, 2016, at the age of 81, having served 52 years.
Document 8: Mary Bell: Mary Flora Bell (born 26 May 1957) is an English woman who, in 1968, aged 10–11, strangled to death two younger boys in Scotswood, an inner-city suburb of Newcastle upon Tyne. She was convicted in December 1968 of the manslaughter of Martin Brown (aged 4) and Brian Howe (aged 3).
Document 9: Mary Jane Kelly: Mary Jane Kelly (c. 1863 – 9 November 1888), also known as Marie Jeanette Kelly, Fair Emma, Ginger, and Black Mary, is widely believed to be the final victim of the notorious unidentified serial killer Jack the Ripper, who killed and mutilated several women in the Whitechapel area of London from late August to early November 1888. She was about 25 years old, and living in poverty at the time of her death.
Document 10: Mary Ann Nichols: Mary Ann "Polly" Nichols (née Walker; 26 August 1845 – 31 August 1888) was one of the Whitechapel murder victims. Her death has been attributed to the notorious unidentified serial killer Jack the Ripper, who is believed to have killed and mutilated at least five women in the Whitechapel area of London from late August to early November 1888.
Document 11: William Bonin: William George Bonin (January 8, 1947 – February 23, 1996) was an American serial killer and twice-paroled sex offender, also known as the Freeway Killer, who committed the rape, torture and murder of a minimum of 21 boys and young men in a series of killings in 1979 and 1980 in southern California. Bonin is also suspected of committing a further fifteen murders.
Document 12: Randy Roth: Randy Roth is a convicted murderer and thief from Washington. He was convicted of the 1991 murder of his fourth wife, Cynthia Baumgartner Roth. He was suspected but never tried for murdering his second wife, Janis Roth, in 1981. In both deaths he was the only witness, he claimed the activity that led to the death was the idea of his deceased wife, and the bodies were cremated as quickly as could be arranged. He was also convicted of stealing in the form of defrauding insurers and the Social Security Administration and was sentenced to one year for theft and 50 years for first degree murder in 1992. At least two true crime books are based on Roth's crimes, "A Rose for Her Grave" by Ann Rule and "Fatal Charm" by Carlton Smith.
Document 13: Lindsay Robert Rose: Lindsay Robert Rose is an Australian contract killer from New South Wales, currently serving five consecutive sentences of life imprisonment without the possibility of parole for the murder of 5 people between 1984 and 1994.
Document 14: 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 15: 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.
ground_truth: Frederick Walter Stephen West