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?
Citizens Arrest:  The group often blended hardcore punk, Grindcore and Powerviolence styles. Grindcore: Grindcore is an extreme genre of music that originated in the early to mid-1980s. Grindcore:  Early groups like Napalm Death are credited with laying the groundwork for the style.
i don't know