One Supreme Court case arising out of this incident, McGrain v. Daugherty, confirmed that Congress may compel witnesses to testify. Though initially suspected in this affair, 
One Supreme Court case arising out of this incident, McGrain v. Daugherty, confirmed that Congress may compel witnesses to testify. Though initially suspected in this affair, Edwin Denby was vindicated by the chief investigator of this event. That man, Thomas Walsh, was a Montana Democrat who led the Senate probe of this incident. For 10 points, name this scandal that also benefitted Edward Doheny's attempts to acquire the Buena Vista Hills and Elk Hills, but was named for the area near Casper, Wyoming that Harry Sinclair acquired for Mammoth Oil from Interior Secretary Albert Fall during the Harding administration.
One Supreme Court case arising out of this incident, McGrain v. Daugherty, confirmed that Congress may compel witnesses to testify.
{Teapot Dome} scandal