The Osage Murders (also called the Reign of Terror) were a series of murders and suspicious deaths of members of the Osage Nation in Oklahoma, primarily between 1921 and 1926.
The Osage had become wealthy after oil was discovered on their land in the 1890s, and conspiracies to exploit and control Osage wealth soon proliferated. During this period, dozens of Osage were murdered in attempts to obtain their oil rights. (The exact number of killings is unknown and may be much higher.)
The Bureau of Investigation (the predecessor of the FBI) was eventually sent to investigate the crimes. Most of the Osage murders were never prosecuted; however, high-profile trials of William Hale and John Ramsey ultimately resulted in their conviction for the 1923 murder of Henry Roan.
The book (2017) and movie (2023) Killers of the Flower Moon are based on these crimes.
Learn more about the Osage Murders through historical newspapers from our archives. Explore newspaper articles, headlines, images, and other primary sources below.