Monsieur Lecoq is the creation of Émile Gaboriau, a 19th-century French writer and journalist.
 Monsieur Lecoq is a fictional detective employed by the French Sûreté.
 The character is one of the pioneers of the genre and a major influence on Sherlock Holmes (who, in "A Study in Scarlet", calls him "a miserable bungler"), laying the groundwork for the methodical, scientifically minded detective.
 In French, "Monsieur" is "Mister" and his surname literally means "The Rooster".
Wilbur Olin Atwater (May 3, 1844 – September 22, 1907) was an American chemist known for his studies of human nutrition and metabolism.
 He is credited with developing the Atwater system, laying the groundwork, in the 19th century, for the science of nutrition in the United States and inspiring modern Olympic nutrition.
Septic Death was a thrashcore band fronted by artist Brian "Pushead" Schroeder on vocals.
 Septic Death's music became a major influence on bands like Integrity, Von, Citizens Arrest, Infest, Rorschach and many other bands tied to the hardcore punk and extreme metal scenes.
Anna Dryden Wolf (June 25, 1890 – 1985) was an American nurse who served as the first dean of the Peking Union Medical College School of Nursing in Beijing, China, and later as the director of the school of nursing and nursing services at Johns Hopkins University.
 Her dedication to higher-level nursing education has been credited with laying the groundwork for the foundation of the Johns Hopkins School of Nursing in 1984.
Citizens Arrest is a New York City-based band that existed from 1989 to 1991 and reformed in 2010.
 The group often blended hardcore punk, Grindcore and Powerviolence styles.
 Their main inspiration in the early days of the band were from Boston area hardcore from the 1980s like DYS and SSD.
 They also derived influence from early Powerviolence pioneers, Infest
Amédé Ardoin (March 11, 1898 – November 3, 1942) was an American Louisiana Creole musician, known for his high singing voice and virtuosity on the Cajun accordion.
 He is credited by Louisiana music scholars with laying the groundwork for Creole music in the early 20th century, and wrote several songs now regarded as zydeco standards.
William D. Foster, sometimes referred to as Bill Foster (1884–1940), was a pioneering African-American film producer who was an influential figure in the Black film industry in the early 20th century, along with others such as Oscar Micheaux laying the groundwork for the modern black film industry.
 He was the first African American to found a film production company, establishing the Foster Photoplay Company in Chicago in 1910.
 Foster had a vision for the African-American community to portray themselves as they wanted to be seen, not as someone else depicted them.
 He was influenced by the black theater community and wanted to break the racial stereotyping of blacks in film.
 He was an actor and writer under the stage name Juli Jones, as well as an agent for numerous vaudeville stars.
 His film "The Railroad Porter", released in 1912, is credited as being the world's first film with an entirely black cast and director.
 The film is also credited with being the first black newsreel, featuring images of a YMCA parade.
 Foster's company produced four films that were silent shorts.
Grindcore is an extreme genre of music that originated in the early to mid-1980s.
 It draws inspiration from some of the most abrasive-sounding genres, including hardcore punk, extreme metal, industrial and noise rock.
 Grindcore is characterized by a noise-filled sound that uses heavily distorted, down-tuned guitars, grinding overdriven bass, high speed tempo, blast beats, and vocals which consist of growls and high-pitched shrieks.
 Early groups like Napalm Death are credited with laying the groundwork for the style.
 It is most prevalent today in North America and Europe, with popular contributors such as Brutal Truth and Nasum.
 Lyrical themes range from a primary focus on social and political concerns, to gory subject matter and black humor.
Sludge metal (also known as sludgecore or simply sludge) is an extreme style of music that originated through combining elements of doom metal and hardcore punk.
 It is also influenced by industrial music and noise rock, such as the work of early Swans, and may reflect both the dissonance and the experimental leanings of these styles.
 It is typically harsh and abrasive, often featuring shouted or screamed vocals, heavily distorted instruments and sharply contrasting tempos.
 While the Melvins from Washington laid the groundwork for both sludge metal and grunge in the 1980s, sludge as a distinct genre emerged after 1990 through the work of bands from New Orleans, Louisiana, such as Eyehategod, Crowbar, and Acid Bath, who generally borrowed from Southern rock.
 Later bands often border on stoner rock (e.g. High on Fire) or post-metal (e.g. Neurosis).
Clyfford Still (November 30, 1904 – June 23, 1980) was an American painter, and one of the leading figures in the first generation of Abstract Expressionists, who developed a new, powerful approach to painting in the years immediately following World War II.
 Still has been credited with laying the groundwork for the movement, as his shift from representational to abstract painting occurred between 1938 and 1942, earlier than his colleagues like Jackson Pollock and Mark Rothko, who continued to paint in figurative-surrealist styles well into the 1940s.

Question: Which group is credited with laying the groundwork for this extreme genre of music that originated in the early to mid-1980s, which Citizens Arrest blended in their music?
Answer: Napalm Death