Build a movie plot around this: Who does Gianni see hacking Berti to death with an axe? An assailant.
ActorRoleFranciosa, AnthonyAnthony FranciosaNeal, PeterPeter NealSaxon, JohnJohn SaxonBullmer, BullmerNicolodi, DariaDaria NicolodiAnne, AnneGemma, GiulianoGiuliano GemmaGiermani, DetectiveDetective GiermaniD'Angelo, MirellaMirella D'AngeloTilde, TildeSteiner, JohnJohn SteinerBerti, ChristianoChristiano BertiLario, VeronicaVeronica LarioMcKerrow, JaneJane McKerrowBorromeo, ChristianChristian BorromeoGianni, GianniWendel, LaraLara WendelAlboretto, MariaMaria AlborettoPieroni, AniaAnia PieroniManni, ElsaElsa ManniBanti, MirellaMirella BantiMarion, MarionStagnaro, CarolaCarola StagnaroAltieri, DetectiveDetective AltieriRobin's, EvaEva Robin'sGirl on Beach, Girl on BeachPeter Neal, an American writer of violent horror novels, is in Italy to promote his latest work, Tenebrae. He is accompanied by his literary agent, Bullmer and his assistant, Anne. Neal is unaware that he has also been followed to Rome by his embittered ex-wife, Jane. Just before Neal arrived in Rome, Elsa, a young female shoplifter, was murdered with a razor by an unseen assailant. The murderer sends Neal a letter informing him that his books have inspired him to go on a killing spree. Neal is soon contacted by the police in the form of Detective Giermani and his female partner, Inspector Altieri.More killings take place. Tilde, a beautiful lesbian journalist, is murdered at her home along with her lover Marion. Maria, the young daughter of Neal's landlord, is later hacked to death with a axe after discovering the killer's lair. Neal notices that TV interviewer Christiano Berti has an unusually intense interest in his work. That night, Neal and his Italian assistant Gianni watch Berti's house. Gianni approaches the house alone to get a better view and sees an assailant hack Berti to death with an axe. However, Gianni is unable to see the murderer's face. He returns to Neal to find the novelist has been knocked unconscious on the lawn.Giermani discovers that Berti was obsessed...