Related Information for Flatlinerz The Flatlinerz are a horrorcore rap group from Brooklyn, New York. The band were one of the first bands to coin the popular horrorcore term. The group was led by Jamal "Redrum" Simmons (nephew of Russell Simmons) and two other emcees named Gravedigger and Tempest.The strategy thought up by Def Jam and Flatlinerz was that the group was to create a style of hip hop music that moved away from the popular gangsta style at the time and deal with darker subjects such as Satanis.. read more