In the short story The Witness for the Prosecution, Leonard Vole is charged for the murder of Miss Emily French whom he had developed a friendship when he saved her after she fell in front at a bus.
He describes her house and Janet Mackenzie hated him, he claimed that she wanted him to look at her business affairs but Janet’s statement said she was confident with it. Then when Mr Mayherne said that Janet also said that French told her that Vole was to marry her which he denied as she knew about Romaine his Austrian “wife”, so he hopes that Janet’s time of coming home is enough to prove his innocence. However at the trial Romaine claims that Vole wasn't home at the time he said, as the trial goes on it’s clear that Vole will be hanged but after Romaine’s letters are exposed the prosecution case fell apart. However Vole was the killer along when Mr Mayherne speaks to Romaine and she confessed.
The character was later reworked for Christie's own stage adaptation.