The article is promotion for a book. I guess they're avoiding spoilers? If you want details, read the Wikipedia page: https://en.wikipedia.org/wiki/Osage_Indi

The article is promotion for a book. I guess they're avoiding spoilers? If you want details, read the Wikipedia page: https://en.wikipedia.org/wiki/Osage_Indian_murders https://en.wikipedia.org/wiki/Osage_Indian_murders > William "Bill" King Hale was responsible for many of the [60+] deaths. [...] Hale and his associates were finally convicted in state and federal trials from 1926 to 1929. They just wanted the oil money. Motivation was simple. The case itself sounds highly complicated but also multiple times bungled case from a newly formed FBI. The biggest problem I see is that it took nearly 10 years and so many deaths before the matter was settled.