context: On a cold night somwhere in suburban Los Angeles, two men leave a party and whom are dressed up as a nun and a hooker. The man dressed as a hooker is brutally murdered by a black-clade white-porcelin masked killer, while his girlfriend (Julie Strain), who was waiting for him, is soon killed as well by the same killer.The story then shifts to a man named Shawn (Danny Wolske) at his new job. Maddy (Debbie Rochon) is interviewed by Shawn and gets the job. That night, while Maddy is having dinner alone at her apartment, she appears to be talking to imaginary people and seemingly receives a letter from her parents, whom she previously claimed were dead, congratulating her on her new job. When she goes to sleep, she dreams of two deaths and awakens in fear.Shawn and Maddy get closer, go on a date, and end up in bed together. Shawn later invites Maddy to a pool party at a friend's house, to which she agrees. At the pool party, hosted by Tillie (Orly Tepper), Maddy meets Shawn's friends Chris (Allen Nabours), Peter (Ronny Gene Blevins) and Laura (Laura Nativo). Later, after most of the guests leave, the remaining people at the party start talking about a "murder club". In confusion, Maddy leaves, disturbed by Chris's words to her: "You never know when you'll need the club's help". Karen and Keith, a couple at the party, are soon murdered by the same masked killer. In her sleep, Maddy has a flashback of when she had an abortion. As a result, her mother (Brinke Stevens) had kicked her out of the house, calling Maddy a "murderer". Her father (Lloyd Kaufman) had tried to stop her, to no avail.During one of Maddy's shopping trips, she starts arguing with a shrewed woman who accidently dents one of Maddy's side car doors while casually chatting on her cell phone and pays no attention to it. The altercation gets physcial when Maddy becomes angered when the woman tells her off and she eventually killing the shrewed lady by smashing her head against a large post. Maddy flees the parking garage unnoticed and then awakes at home, covered in blood. She realizes what she has done and calls Shawn. He races over and tells her not to worry, as he'll give her an alibi.The next day, on her way to Tillie's house, Maddy hears Shawn, Tillie, Peter and Laura talking amongst each other. She then discovers that the "Murder Club" was all a joke. Shawn tries to convince the others give Maddy an alibi. Chris agrees, and Peter and Laura want to ignore everything, though Tillie believes they should head to the police. Maddy heads home, upset by the revelation. She later has a dream of Peter and Laura being killed.Another day later, Maddy visits Tillie's home again but hides to avoid being seen. Tillie talks to Shawn about finding Peter and Laura's bodies. Maddy then blacks out and has a vision of Tillie's death. When she awakes, she goes to Tillie's home and finds her dead.. having been electricuted in her swimming pool.Maddy then goes to Chris's home, believing Shawn to be responsible for the deaths. Then she races over to Laura and Peter's home. There, she finds the dead bodies and tells Chris that she believes Shawn is behind the deaths. She heads back to her apartment and Shawn arrives. She attempts to attack him but he retaliates and tells Maddy that Chris is the real murderer. He shows a mask and knife, saying he found them in Chris's home. Just then, Chris kills him by impaling him with an axe. A shocked Maddy demands an explanation. Chris admits to the murders, saying that he did so he could have Maddy. The first death was the owner of the company. Killing him made Shawn head of the company and gave Maddy a place to work. He then killed the various people who wanted to stop Maddy from being with him. Since Maddy has killed somesone, Chris belives that she and he are ment to be together.A small chase begins, with Maddy stuck in the bathroom of her home. Chris starts to chop down the door with his axe, but before he can reach Maddy, she hits him with a set of scales and flees. She then becomes trapped in the bedroom and the scene cuts to black.The final scene shows Chris heading to Las Vegas. He pulls over to a car stuck on the side of the road. The man inside asks for a tire-iron. Chris considers killing him, until he sees that the man has a wife. After helping them and watching the couple head off, Chris heads back to the car trunk. He opens it, revealing a still-alive and tied-up Maddy. He smiles, then shuts the trunk, and resumes the journey.
question: Who does Maddy tell Chris she believes is behind the deaths?
answer: Shawn