Though they never qualified for the heavy metal podium during their decade-long existence, Dallas, Texas' Rigor Mortis managed to trace the entire development of speed-to-thrash-to-death metal with the gradual evolution of their raw, violent sound. This lack of definition within any one subgenre likewise contributed to the band's commercial failures, but peddling to mainstream tastes or aping established formulas was never on the agenda for horror movie buffs Bruce Corbitt (vocals), Mike Scaccia (guitar), Casey Orr (bass), and Harden Harrison (drums), as they persisted through...