Considering the videos shown by Sheriff Joe Arpaio today as part of his grand expose regarding Pres. Obama's are hosted by the YouTube channel "TeaPartyPowerHour", it's possible that the commission he organized to look into the matter might not be entirely objective, but yet, Arpaio was out there claiming that he has "probable cause" to believe that the President's birth certificate is a fraud.
I didn't get through all the "evidence", mostly because I think I have better things to do with my time, but it's worth noting that one of the supposedly damning bits of evidence (that the PDF released by the White House has layers when opened in Adobe Illustrator) was discredited by the National Review almost a year ago. Of course, it took me at least fifteen seconds of Googling to find that bit of information, so maybe that was too much trouble.
Way to go, Joe. Maybe you should consider launching an investigation into actual problems facing your county instead, like the numerous sex crimes your department essentially ignored.