Body Heat (1981)

Ned and Matty do kill Edmund. Ned attacks Edmund with a board and then takes his body somewhere and destroys the place with a bomb that he had made. Ned then later learns that Matty had the will changed but since it was not valid, all of Edmund's money goes to her and not half to her and the other half to Edmund's sister, Roz. Ned also discovers that Edmund's glasses that he always wears were not at the crime scene and that someone was trying to call Ned the night of the murder which makes Ned a suspect. When Ned asks Matty about the glasses, she says that the maid must have took them and she wants money if she is to return them. Matty later says to Ned that the maid stopped by Matty's place to drop off the glasses, but the man who helped Ned make the bomb tells Ned that he saw Matty and helped her make a bomb. When Ned sees Matty, he forces Matty to go into the boathouse where the glasses supposedly are and where Ned discovers a bomb that Matty may have placed. As Matty enters the boathouse, it explodes. Ned is arrested and put in jail for the 'murder' of Matty and for possibly Edmund's murder. That night, Ned wakes up and starts to realise that Matty is somehow still alive. But everyone denies it because the dental records show up as Matty's. But after receiving a yearbook, Ned discovers that Matty's real name is Mary Ann Simpson, which was the name of the girl who looked a lot like Matty shown earlier in the movie. Also that Matty is the name of the girl posing as Mary Ann Simpson. Which means that it was the girl posing as Mary Ann Simpson and not Matty (Turner) whose body was burned to death. The movie ends with Matty/Mary Ann Simpson (Turner) on a beach in Kauai.

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