If I were Horowitz I would be talking to each of Shearer, Steele and Blumenthal and telling them that the first one to flip on the other two gets the deal.
Unfortunately, Horowitz is an Inspector General in the Justice Department, whose remit includes only job-related misconduct by DoJ/FBI employees. Are appropriate law enforcement and judicial entities investigating the manifold crimes and vast networks of conspirators within government, the DNC, the Clinton Campaign, academia, media, and ranks of free-lance scoundrels? We can only hope — there is no proof anything is being done.