Presumed Dead (2006) on Netflix

Plot summary

Seth Harmon is a celebrated crime novelist whose first new book in years is about to be released. A young woman, Paige Stevenson, vanishes at his home, and he becomes the prime suspect. Detective Mary Anne Cooper is handed the task of piecing the missing person case together. The question before her is whether the seeming crime is an elaborate publicity stunt tied to the book launch or something the author, desperate for material, arranged himself. Cooper is determined to separate fiction from reality, and she matches wits with Harmon during the investigation, in which each stage opens more layers of the puzzle.