William J. Burns International Detective Agency

[3] The Burns Agency was hired to track down Industrial Workers of the World (IWW) organizers in the aftermath of the Wheatland Hop Riot.

[4] Burns agents infiltrated the Industrial Workers of the World during an organizing drive in the copper mines of Arizona.

Activities included issuing fake IWW membership cards, infiltrating the workforce, spying, and intercepting the mail of organizers.

[5] Agents of the Burns Detective Agency were hired to "investigate" jurors in a federal trial of Harry F. Sinclair in November 1927.

Sinclair hired William J. Burns to have 14 agents follow the jurors and produce daily reports on their activities.