Arsenic (rat poison) is one because it leaves little trace that the murder victim has not succumbed to a natural death, but there are other. Agatha Christie became an expert on poisons while researching her mystery novels.
Arsenic.
Arsenic is a common rat poison often found in mystery titles. Arsenic and Old Lace
arsenic
arsenic
Arsenic was a popular poison in Agatha Christie's novels because it was readily available, tasteless, and odorless, making it a subtle and effective murder weapon. Its use added an element of mystery and intrigue to her plots, allowing for intricate crime-solving narratives that captivated readers.
Arsenic is used in rat poison and is in the title "Arsenic and Old Lace."
Arsenic (and Old Lace).
"Arsenic"
Arsenic is used in rat poison and is in the title "Arsenic and Old Lace."
Historically, arsenic was used on rats. Some insecticides used thallium, a heavy metal.
carbon is used in rat poison and is the title of a murder mystery
Arsenic is used in rat poison and is in the title "Arsenic and Old Lace."