(ennifer)

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Always? Jennifer San Marco. Mass murders are no more horrific than single, double or serial murders... often committed by women.
Also Jennifer San Marco.
That's not what you asked. :P But, not that I can find. However, in 2006 Jennifer San Marco shot her neighbor and 6 co-workers
Hey ever hear of Jennifer San Marco or Amy Bishop? However, Women serial killers usually don't commit mass shootings.
Amy Bishop, Jennifer San Marco, Debra Brown. Look em up.