 When his supply of Derma 28 runs out, he realizes he must kill to obtain more, and injects himself with Derma 25 in order to become monstrous and remorseless, so that he may seek these victims without hesitation.Because many of the murders take place near the docks where shiploads of Japanese refugees are arriving, and leave behind the victims' bodies with holes in the neck where Dr. Levin has extracted the glands, the refugees claim that a vampire (whom they call "Seddok", though this is not a Japanese name) is responsible for the attacks.During a meeting with police, a restored-to-humanity Dr. Levin speculates that the Hiroshima survivors' tales of a mutated killer are due to psychological strain from the radiation damage to their bodies...but also wonders aloud whether the "vampire" these witnesses describe might simply be a disturbed man wishing to be normal again.