State Department interfered with probe of serial sexual harasser

State Department officials exerted "undue influence and favoritism" in short-circuiting an internal investigation of multiple sexual harassment charges against a regional security officer with a long history of such allegations.

Investigators from the department's Bureau of Diplomatic Security found "overwhelming evidence of the [regional security officer's] culpability," according to a State Department IG report.

Those allegations were lodged against an unidentified regional security officer in 2011, but "the RSO already had a long history of similar misconduct allegations dating back 10 years at seven other posts where he worked," the IG said.

The RSO had been suspended for five days following a 2006 internal investigation.