Metalheads have wondered what Richmond, Va., quintet Lamb of God would sound like after vocalist Randy Blythe served time in a Czech Republic jail, awaiting trial on manslaughter charges after a 19-year-old fan he pushed offstage in Prague in 2010 died of injuries sustained in the fall. The singer was acquitted, and just released a gripping new memoir, “Dark Days.” Returning to Lamb of God, Blythe references the month he spent in a stark 123-year-old prison, which the Nazis used as a torture camp during World War II, in “512,” wailing “I can’t recognize myself” while a guitarist simulates a siren. He also cites that war in the screeching “Anthropoid,” inspired by a Nazi leader known as “the butcher of Prague.” Elsewhere, Blythe and his Lamb of God cohorts blast the media for disaster-hungry obsession on “Engage the Fear Machine.” Deftones frontman Cheno Moreno shows up on “Embers,” but sounds tame next to the recharged Blythe. (Out Friday)
Lamb of God plays the Xfinity Center, Mansfield, on Aug. 4.