Penn State: In 2010, we investigated those nasty allegations against our employee, and we're pretty sure he didn't do anything wrong

Penn State defies Facebook campaign calling for it to drop climate lecture | Leo Hickman | Environment | guardian.co.uk

In 2010, Penn State conducted its own four-month investigation into allegations of research misconduct against Mann and a panel of five University faculty members from various fields determined that the scientist violated no professional standards in the course of his work.