Senate Homeland Security and Governmental Affairs Chairman Joe Lieberman today chided a freshman Republican on his panel for divulging details of an unpublished investigation into the Secret Service’s prostitution scandal.

In a memo to the full committee today, Sen. Ron Johnson (R-Wis.) laid out several points that he said are detailed in a report written by the Department of Homeland Security’s Office of the Inspector General.

The memo said the first phase of that report was completed late last month, and that subcommittee staff reviewed it at the inspector general’s office. Staffers were not allowed to keep a copy of the report, however, and the document has not been made public.

Lieberman (I-Conn.) blasted Johnson’s memo, calling it an “unauthorized leak of sensitive, selective information from the IG’s report” and saying Johnson’s assessment is unfair to the Secret Service and agency Director Mark Sullivan.

“Both have served our nation honorably and ably for a long time and deserve the benefit of a presumption of innocence unless real evidence leads to a different conclusion,” Lieberman said in a written statement. “I will await the inspector general’s finished report before making any judgments.”