The police appealed to the public for information, and the driver of the second car responded with an anonymous letter a short time later.
The driver had seen what they thought was a bag of garbage in the street.
The following are 10 crimes where one possible clue is a letter that may, or may not, have been written by the killer.
Dorothy Lucas, 22, was out grocery shopping with her three-month-old daughter Diane on August 23, 1937, in Chicago, Illinois.
The baby was in good condition, and she was even dressed in new, clean clothes.
Amazingly, baby Diane was found 23 hours after the police got an anonymous phone call leading them to the back steps of an apartment building.
The writer also said, “My only crime, if you can call it such, was too much mother love.” And instead of signing her name, the author signed off as “The Penitent Mother.” Police said that the note was most likely real and offered a valid explanation for the strange kidnapping.
On the night of December 28, 1999, 44-year-old Lynn Brett was out with friends in Hicksville, New York.
Three days after the baby was returned, the Lucas family got a long letter confessing to the crime.
In the letter, the writer identified herself as a 28-year-old woman whose husband and a child had died recently.