My 2 cents... *puts on my tinfoil hat*
Stem cell research. Someone at the "labs" was using stem cells to cure a host of mental and physical diseases and it when horribly wrong....
*takes off the tinfoil hat* Ok seriously, my theory is it was something used to stimulate the portion of the brain that deals with aggression. Someone at the lab was trying to change the brain chemistry in a person with high levels of aggression and calm them down and it didn't work like they had hoped for.
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