From a deleted 700 Club interview archived on the internet archive at http://web.archive.org/web/20000122101421/http://www.cbn.org/the700club/johannamichaelsen.asp
Johanna says you can trace occultic or demonic influences behind most of the school shootings, citing the German group "Ramstein" as being a deadly influence on the shooters at Columbine.
From Wikipedia, Rammstein: Relation to Violent Events
Rammstein were cited in relation to the Columbine High School Massacre in 1999, when photos of Eric Harris and Dylan Klebold wearing Rammstein T-shirts were revealed. Though there was no evidence to correlate the two events, the band felt obliged to issue a statement: "The members of Rammstein express their condolences and sympathy to all affected by the recent tragic events in Denver. They wish to make it clear that they have no lyrical content or political beliefs that could have possibly influenced such behaviour. Additionally, members of Rammstein have children of their own, in whom they continually strive to instill healthy and non-violent values". ... Following the conclusion of the Beslan school hostage crisis in Russia in September 2004, the Russian authorities claimed that the terrorists had "listened to German hard rock group Rammstein on personal stereos during the siege to keep themselves edgy and fired up". The claim has not been independently confirmed.
"Evidence" of offensive phrases found in backwards lyrics in Backwards masking in music probably helps bolster, in the minds of adherents, claims that the power of music can incite madness or homicidal behavior.
Music has allegedly been used as an instrument of torture:
Music has been used in psychological operations. The term music torture is sometimes used by critics of the practice of playing loud music incessantly to prisoners or people besieged. The United Nations and the European Court of Human Rights have banned the use of loud music in interrogations, but it is still being widely used. The term torture is sometimes used to describe the practice. While it is acknowledged by US interrogation experts that it causes discomfort, it has also been characterized by them as causing no "long term effects."
If music can be torture, could it destabilize some people?
Is there any medical psychiatric evidence that specific kinds of music or lyrics can incite homicidal behavior, either in average people or people having a non-homicidal mental condition?