He recalled that a radio show host read an anonymous e-mail sent to all the Wisconsin Republican state senators "threatening to put a bullet" through their heads and asserting that the e-mailer knew where the senators and their families were.
The Wisconsin Department of Justice, Division of Criminal Investigation and the Wisconsin Capitol Police have investigated numerous threats against elected officials over the last four weeks. Last evening, the DCI identified and located a subject suspected of sending at least two of those threats.
The suspect subsequently admitted to authoring and sending two e-mails threatening to kill the Governor and members of the Senate. DCI Administrator Ed Wall said “The Division of Criminal Investigation takes these kind of threats seriously and will follow through with the investigation and prosecution whenever possible.”
This investigation is still ongoing and no further information will be released pending presentation to the District Attorney in the jurisdiction of the threat origination. The Department of Justice has notified members of the Governor's Office and Senate in regard to the recent developments in this investigation.
Here is the language from those threats.