No, I didn't pick up that they were upset at all. I read a report they gave. In fact, they were very complimentary of how it was handled overall. I'm thinking the folks pinged to this thread are looking through some kind of weird computer screen of preconception instead of reading the article.
Read his following statement. Seems to me he was upset at the Norman police.
"Barakat said the FBI agents were polite and professional throughout the investigation, but he also said Norman police were "very aggressive, very mean."