Kawamashi Cr Collector

So what precisely was Kawamashi Cr doing at the Red One Motel on that fatal night? Is he really the inventor of Xantiax gas? Was he the main target of the attack, its instigator or just collateral damage? And more importantly, is there a cure for the Berzerks' condition? So many questions that he’s currently only able to answer with massive blows of fire extinguishers to the head...