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 ?

Context paragraphs:
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.

Texarkana Moonlight Murders: The Texarkana Moonlight Murders, a term coined by the news media, references the unsolved murders committed in and around Texarkana in the spring of 1946 by an unidentified serial killer known as the "Phantom Killer", or "Phantom Slayer".  The killer is credited with attacking eight people within ten weeks, five of whom were killed.  The attacks happened on weekends between February 22, 1946 and May 3, 1946.  The first two victims, Jimmy Hollis and Mary Larey, survived.  Some police officers are not sure if their attack was connected with the murders.  The first double murder, which involved Richard Griffin and Polly Ann Moore, happened four weeks later.  The second double-homicide, involving Paul Martin and Betty Jo Booker, occurred exactly three weeks from the first murders.  The Texas Rangers came in to investigate, including the famous M. T. "Lone Wolf" Gonzaullas.  Finally, almost exactly three weeks later, Virgil Starks was killed and his wife, Katie, was severely wounded.  Most officials no longer connect that attack to the other murders.  Contrary to popular belief, the killer did not attack during a full moon, but did strike late at night.

Grim Sleeper: Grim Sleeper is the nickname for convicted serial killer Lonnie David Franklin Jr., responsible for at least ten murders and one attempted murder in Los Angeles, California.  The attacker was dubbed the "Grim Sleeper" because he appeared to have taken a 14-year break from his crimes, from 1988 to 2002.  In July 2010, Franklin was arrested as a suspect, and, after many delays, his trial began in February 2016.  On May 5, 2016, the jury convicted him of killing nine women and one teenage girl.  On June 6, 2016, the jury recommended the death sentence, and on August 10, 2016, Los Angeles Superior Court sentenced him to death for each of the ten victims named in the verdict.

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).

Israel Keyes: Israel Keyes (January 7, 1978 – December 2, 2012) was an American serial killer, rapist, arsonist, burglar and bank robber.  Keyes admitted to violent crimes as early as 1996, with the violent sexual assault of a teenage girl in Oregon.  He committed a long series of rapes and murders until his capture in 2012.  He was being held in custody, awaiting trial for the murder of Samantha Koenig, when he committed suicide in prison.

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.

HM Prison Low Newton: HM Prison Low Newton is a Closed prison for female adults and young offenders.  The prison is located in the village of Brasside (near Durham) in County Durham, England.  Low Newton is operated by Her Majesty's Prison Service.  The prison is located next to HMP Frankland, the Category A adult male prison.

Robert Maudsley: Robert John Maudsley (born June 1953) is a British serial killer responsible for the murders of four people.  He committed three of these murders in prison after receiving a life sentence for a single murder.  He was alleged to have eaten part of the brain of one of three men he killed in prison, which earned him the nickname "Hannibal the Cannibal" among the British press; however, the Press Complaints Commission records that national newspapers were subsequently advised that the allegations were untrue, according to the autopsy report.

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.

Matti Haapoja: Matti Haapoja (September 16, 1845, Isokyrö – January 8, 1895, Turku) was a Finnish serial killer who was much covered by the press at the time of the murders.  The exact number of his victims is unknown.  He was convicted of two murders and was scheduled for a trial for his third murder trial when he committed suicide in his cell.  He can be linked to seven other identified murder cases, but most of those happened during his exile in Siberia and are poorly documented, so his involvement is not certain.  It is claimed that he confessed to 18 murders, but there are no details about this supposed confession, and the figure should be regarded as unreliable.  Some sources estimate his total number of murders as 22–25.  He also non-fatally wounded at least six men in knife fights.

Supporting paragraphs: Rosemary West Fred West
Answer: Frederick Walter Stephen West