The head of the Bay State's Democratic party is demanding U.S. Sen. Scott Brown reveal who showed him the fake photograph of Osama bin Laden's corpse after the Wrentham Republican went on television bragging that he'd seen the image - and later confessed he'd been duped.

"He needs - right away, today - to provide answers to the following questions: who showed him the fake photo, who told him it was genuine when it wasn't, and what are the procedures he uses to make sure he has reliable information before he gives voters that information," said Massachusetts Democratic Party chairman John Walsh in a statement today.

Eric Fehrnstrom, a spokesman for Brown, said today: "With the Sal DiMasi corruption trial going on, I'm surprised that John Walsh has the time to criticize Republicans."

Brown went on New England Cable News and FOX 25 yesterday and said he'd seen a photo of a dead bin Laden. He later said the photo he had seen wasn't authentic and a staffer said the senator had obtained the photo from a reliable source.

"Sen. Brown's actions yesterday are a very serious concern to all voters in our state and a lot of questions remain that he needs to answer," Walsh said. "As a member of the Senate Armed Services Committee, Sen. Brown owes the people of Massachusetts more details as to what led him to believe that he was shown an authentic photo and then what led him to feel comfortable enough to speak out publicly about the photo."

President Obama said yesterday that he won't release the photos - and Brown agreed with his decision.

Walsh added: "Sen. Brown needs to understand that his words matter and his assertions are taken at face value because of his position. He now needs to be straight with the public and answer the serious questions now being posed, not just by me but by many people in the state and around the country."