Question: Fred and Edie was a novel about a British couple executed for whose murder?

Context paragraphs:
Murder of Dale Harrell: The murder of Dale Harrell (December 18, 1974 – February 9, 2009, age 34) occurred after he was fatally attacked on January 14, 2009 by his wife Marissa-Suzanne "Reese" DeVault (born November 6, 1977).  Her trial made national and global headlines.  The case was noted as being very similar to that of Jodi Arias, with whom DeVault was in contact and whose murder trial occurred in the same courthouse one year earlier.  Though she faced the possibility of a death penalty for her crime, DeVault was sentenced to life in prison.  She is imprisoned within the Arizona Department of Corrections.

Gone (2007 film): Gone is a 2007 British-Australian psychological thriller film starring Shaun Evans and Amelia Warner as a young British couple travelling through the Australian outback who become involved with a mysterious and charismatic American (Scott Mechlowicz) whose motive for imposing his friendship upon them becomes increasingly suspect and sinister.

Murder of Ashley Ann Olsen: Ashley Ann Olsen was an American woman living in Florence, Italy whose murder in her apartment in 2016 drew wide attention.  An illegal migrant who arrived in Italy from Senegal during the 2015 European migration crisis was arrested and charged with murder.

Fred and Edie: Fred and Edie is a 2000 epistolary and semi-biographical novel by Jill Dawson.  The novel is loosely based on the murder of Percy Thompson by his with Edith Thompson and, her lover Frederick Bywaters.  The novel develops a sympathetic reading of Edie's understanding of the crime and subsequent incarceration as depicted in her unsent letters to Fred.

The Secret People: The Secret People (1935) is a science fiction novel by John Wyndham.  It is set in 1964, and features a British couple who find themselves held captive by an ancient race of pygmies dwelling beneath the Sahara desert.  The novel was written under Wyndham's early pen name, John Beynon.

Edith Thompson and Frederick Bywaters: Edith Jessie Thompson (25 December 1893 – 9 January 1923) and Frederick Edward Francis Bywaters (27 June 1902 – 9 January 1923) were a British couple executed for the murder of Thompson's husband Percy.  Their case became a "cause célèbre".

Peter and Rosemary Grant: Peter Raymond Grant, , , and Barbara Rosemary Grant, , , are a British couple who are evolutionary biologists at Princeton University.  Each currently holds the position of emeritus professor.  They are known for their work with Darwin's finches on Daphne Major, one of the Galápagos Islands.  Since 1973, the Grants have spent six months of every year capturing, tagging, and taking blood samples from finches on the island.  They have worked to show that natural selection can be seen within a single lifetime, or even within a couple of years.  Charles Darwin originally thought that natural selection was a long, drawn out process.  The Grants have shown that these changes in populations can happen very quickly.

Murder of Grace Brown: Grace Mae Brown (March 20, 1886 – July 11, 1906) was an American skirt factory worker whose murder caused a nationwide sensation, and whose life inspired the fictional character Roberta Alden in the 1925 Theodore Dreiser novel, "An American Tragedy", as well as the 2003 Jennifer Donnelly novel, "A Northern Light".  The facts of the real murder are laid out in the two non-fiction books, both published in 1986: "Adirondack Tragedy: The Gillette Murder Case of 1906", written by Joseph W. Brownell and Patricia A. Wawrzaszek, and "Murder in the Adirondacks: An American Tragedy Revisited", by Craig Brandon.  Shelley Winters was nominated for the Academy Award for Best Actress for her performance in the role inspired by Grace Brown (with the name changed to 'Alice Tripp') in the 1951 film "A Place in the Sun," loosely based on the Dreiser novel.

Kyllikki Saari: Auli Kyllikki Saari (December 6, 1935 – May 17, 1953) was a 17-year-old Finnish girl whose murder in 1953 is one of the most infamous cases of homicide of all time in Finland.  Her murder in Isojoki remains unsolved.

Night of January 16th: Night of January 16th is a theatrical play by Russian-American author Ayn Rand, inspired by the death of the "Match King", Ivar Kreuger.  Set in a courtroom during a murder trial, an unusual feature of the play is that members of the audience are chosen to play the jury.  The court hears the case of Karen Andre, a former secretary and lover of businessman Bjorn Faulkner, of whose murder she is accused.  The play does not directly portray the events leading to Faulkner's death; instead the jury must rely on character testimony to decide whether Andre is guilty.  The play's ending depends on the verdict.  Rand's intention was to dramatize a conflict between individualism and conformity, with the jury's verdict revealing which viewpoint they preferred.

Supporting paragraphs: Fred and Edie Edith Thompson and Frederick Bywaters
Answer: Thompson's husband Percy