The Cat o' Nine Tails (1971)
A newsman works with a blind puzzle-solver to uncover a deadly conspiracy linked to a genetic research facility. psychopath, adoption, stalker, murder, laboratory, homicidal, serial killer, slasher, whodunit, maniac, psychiatrist, policeman, mental illness, psycho killer, child kidnapping, multiple murder, voyeurism, madman, blind man, giallo
ETC.
