All of the victims were carrying slacks or blue jeans when they disappeared, and at many crime scenes there ended up sightings of a guy putting on a forged or a sling and driving a brown or tan Volkswagen Beetle. By his possess admission, he had by then mastered the necessary abilities-in the period before DNA profiling-to leave minimal incriminating forensic evidence at criminal offense scenes.
The ironically aptly-named Electra Complex connection concerning the surrogate father and daughter pair of Nemo and Electra in Nadia: The Secret of Blue Water. All this has left a unpleasant legacy on very poor Iesada, even after her father dies: she's fearful to have sex at all (even with her trusted bodyguard Taniyama) and the poison is gradually killing her.