"Pennsylvania State University has found no evidence of research misconduct on the part of Michael Mann, the prominent climatologist who is a leader in efforts to chart Earth’s past temperature patterns and has been a longstanding target of groups and individuals fighting restrictions on greenhouse gases. The report released today examined the last of four focused questions about his work methods. A panel cleared him of wrongdoing on three questions in February."
"Climate Scientist Cleared of Altering Data" (New York Times)
"Penn State Clears Mann in Climate-Gate Probe" (Post Carbon)
"Climategate Scientist Michael E. Mann Exonerated" (Huffington Post)