Here's Spiegel reporting on the conclusions of the University of Bayreuth committee that looked into his PhD thesis:
When initial accusations emerged in February that then-German Defense Minister Karl-Theodor zu Guttenberg had plagiarized parts of his doctoral thesis, he responded that the allegations were "absurd." In the ensuing weeks, as it became increasingly clear that significant passages of his dissertation were exact replications of previously published works, he insisted that it was the result of mere oversight. He never meant to copy, he maintained.
But on Friday, the University of Bayreuth, which awarded Guttenberg his Ph.D. title in 2006, announced its conclusion that [zu Guttenberg] had intentionally plagiarized. Guttenberg, the university said in a statement, "extensively violated academic standards and intentionally cheated."