“The movie, directed by Andrew Jarecki, is a murder mystery based on the bizarre life of the real estate heir Robert A. Durst — a troubled multimillionaire with mild autism whose existence has been marked by the unsolved disappearance of his first wife; the unsolved fatal shooting of his confidante in Los Angeles; a secret second marriage; another fatal shooting (this time paired with a grisly dismemberment); living on the cheap disguised as a woman; a nationwide manhunt that ended with a shoplifting arrest; and an acquittal for the murder dismemberment but prison time for parole violations."
“… Ms. Dunst plays the missing wife who was a young dental hygienist named Kathleen McCormack living in a building owned by the Durst family when she met Mr. Durst. After the two had gone on two dates, he asked her to live with him. In January 1972, she did.”