Underground "murder metal" legends Macabre have been going at it for well over a decade and a half, writing favorites such as Dahmer (2000),and Sinister Slaughter (1993), albums heavily based on famous psychopaths and murderers. Consisting of band members Corporate Death(guitars, vocals), Nefarious (bass guitar, vocals), and Dennis the Menace (drums), this trio has put out some of the more unsettling music of thepast 20 years.
http://murdermetal.bandcamp.com/
