Serial killers are twisted and sick people doing horrifying things to their victims. However, when they find their soulmate, you'll get the match made in hell. Almost all of our duo killers are well known for their extraordinary cruelty and brutality that goes beyond what we've seen in movies. We have the youngest and the oldest ones here, so let's look at our top 10 of the most notorious killer couples. 10. Alton Coleman and Debra BrownAlton Coleman and Debra Brown had no plan, as they've murdered, raped, and robbed whomever they stumbled uponAlton Coleman and Debra Brown were a disturbed and brutal killing couple. Colman had prior arrests for rape and served his sentence, and after meeting Debra, the duo started their slayings across the state. They have raped and murdered eight people during a short period in 1984.Alton and Debra began with their atrocities in Wisconsin by killing the nine-year-old girl. After that, they were on the run and continued with their barbarities across the country. On their way, they've raped and molested children but also abducted, kidnapped, robbed, and murdered everyone else. Alton Coleman was executed in 2002, and Debra Brown got 140 years of imprisonment. She would have easily qualified among the most notorious women serial killers in 20th century, if she had worked alone.9. Caril Ann Fugate and Charles Starkweather Caril Ann Fugate and Charles Starkweather were a couple of teenagers who went on a killing spreeCharles Starkweather and Caril Ann Fugate were a couple of teenagers who went on a two-month killing spree in the late 1950s. At that time, Charles was 19, and Caril only 14. The first murder occurred while Charles tries to rob the gas station. Afterward, he went to Fugante's home, and together they killed her parents and baby sister. After a while, they started to run, committing random killings.When they were arrested, Caril claimed that she was the hostage. Later on, Charles confessed his crimes accusing Caril of other murders. He was convicted and executed aged 20. Caril was paroled after serving 18 years in prison.8. Inessa Tarverdiyeva and Roman PodkopaevInessa Tarverdiyeva and Roman Podkopaev, along with their daughters, killed for money and because they enjoyed itAt first glance, Inessa Tarverdiyeva and Roman Podkopaev were an average couple residing with their two daughters. She was an ex-teacher, and he was a dentist, living an ordinary life in Stavropol, Russia. However, the truth was far from normal. The family committed a series of robberies and murders for six years since 2007.Moreover, their daughters were involved as they pretended to go on a family vacation while they would steal and kill innocent people. They were caught after robbing the police officer's home in 2013. During the arrest, Podkopaev was killed in crossfire while the rest of the "Gang of Amazon" (media nickname) went to jail.7. Ian Brady and Myra HindleyIan Brady and Myra Hindley raped and tortured their victimsIan Brady and Myra Hindley were a twisted and sick duo who tortured, raped, and killed five children aged ten to seventeen. These murders occurring in England from 1963 till 1965 are also known as Moors Murderers, as they buried victims in Saddleworth Moor.The psychopath Ian Brady met Myra Hindley in the factory they had worked at. Soon after they started dating, they have begun to plan a perfect murder. They started their killing spree by alluring the young Pauline Reade, whom Myra knew, to help them, ending up with Pauline's raping and murdering. Moreover, they tricked all their victims by seeking help and offering them a ride. They were arrested when the witness, who helped them do their last murder, called the police.6. Ray and Faye CopelandRay and Faye Copeland looked like a bit grungy old married couple. However, they were serial killersDuring the 1980s, the old married couple, Ray and Faye Copeland, killed at least five (seven more suspected) drifters and hitchhikers at their Missouri farm. Ray was known as a con man and a thief from a young age, as he had spent a few years in jail for his crimes.He came up with a scheme to hire the drifters to buy livestock with fake checks, re-sell the cattle afterward, and kill the travelers to cover his con. During this time, they employed the worker who had his suspicions. When Ray tried to kill him, the man managed to escape and alert the authorities. After their arrest, Ray and Faye Copeland were the oldest couple in America sentenced to the death penalty.5. Karla Homolka and Paul Kenneth BernardoKarla Homolka assisted her fiancée Paul Bernardo to rape and kill her young sisterKarla Leanne Homolka and Paul Kenneth Bernardo were engaged at the beginning of the 1990s when they committed the first rape and murder. The Canadian couple's first victim was Karla's young sister, as she helped Paul rape her by drugging and restraining her. Therefore, this crime was sick on so many levels, and since they videotaped everything, it gets even more twisted. They were arrested after committing three killings. Paul got a life sentence, and Karla testified against Paul to get a reduced punishment. She was released after serving twelve years in prison.4. Raymond Fernandez and Martha BeckRaymond Fernandez and Martha Beck were known as the Lonely Hearts KillersAlso known as 'The Lonely Hearts Killers,' Raymond Fernandez and Martha Beck allegedly killed over twenty women. They prayed on their victims through lonely hearts ads during the late 1940s. Martha loved Raymond unconditionally, as she left her children for him and participated in his scam to rob lonely women. The couple posed as sister and brother to gain the victims' trust before robbing and killing them. Moreover, after their arrest, they confessed to murdering women to get shorter sentences. However, they were extradited to New York for the trial, and both got the death penalty before being executed in 1951.3. Gerald and Charlene GallegoLearn all about Gerald and and Charlene and their horrific crimesTwisted couple Gerald and Charlene Gallego found themselves bored with their love life, so they decided to involve sex slaves. They have been mostly abducting teenage girls in Sacramento since the end of the 1970s. The couple operated so that Charlene loured the victims into the van, as Gerald would tide them up, threatening them with the gun. They would take the victims to a secluded place, killing them after the rape and torture. After their arrest, Charlene took a plea deal for testifying against Gerald, claiming she was the victim as well. She spent only 16 years in jail, as Gerald died behind bars waiting for execution. 2. Fred and Rosemary WestThe twisted couple, Fred and Rosemary West killed at least a dozen of womenFred and Rosemary West were a married couple with eight children and one child, and one step-child from Fred's previous marriage. They have committed their crimes in Gloucester, England, from the mid-1960s for the next two decades. Fred forced Rosemary to work as a prostitute, watching her through the peephole.Their victims were women that were tortured, raped, killed, and buried in the backyard or in the cellar. Fred also abused their daughters, and Rosemary killed Fred's step-daughter by herself. After Fred was arrested, police found the bodies of twelve victims buried at their home. While he killed himself, waiting for the trial, Rosemary will spend her life behind bars.1. Carol M. Bundy and Doug ClarkLearn more about Bundy and Clark in this eerie documentaryAlso known as the Sunset Strip Killers, Carol M. Bundy and Doug Clark killed their victims to fulfill their twisted sexual desires. Doug Clark was a rapist and a pedophile, and later on, he became a murderer and necrophiliac. He found his soul mate in Carol Bundy as she was sick and twisted as him.Together, they've killed prostitutes and runaways in Los Angeles during 1980. The killings were brutal, as they even decapitated some of the victims. Once they were arrested, Bundy tried to defend herself, blaming all on Clark. However, her involvement was proven, so she died in prison. On the other hand, Clark stated that he was manipulated by Bundy, but as the evidence against him was strong, he got the death sentence.Many of these crimes inspired numerous movies and TV shows, as reality often can be crueler than the imagination. We'll leave you to explore the filmography inspired by the crimes these people committed, as it may surprise you. To conclude, the cruelty of murderers can be beyond our imagination.Have you ever heard of these murderers? Did you ever watch movies or TV shows inspired by their crimes? Please write to us in the comment section, as we would like to hear your opinion.