"Pennsylvania cops say they have no records that support Mike McQueary’s claim that he called police..."

If McQueary's credibility is bad, that undercuts his value of his eyewitness testimony:

McQueary’s testimony is a key in the grand jury’s investigation and the prosecution’s case against Sandusky, and any discrepancies in his testimony and public statements are sure to be used against him by defense lawyers at trial. The New York Times reported Wednesday night on its website that a critical break in the case came in 2010 when investigators spotted a brief mention on an Internet forum about Penn State athletics that a coach, McQueary, might have some information about the long-standing rumors of sex abuse by Sandusky. Investigators set up a meeting and McQueary told his story - a graphic account of the rape he had witnessed. ...

According to New York defense attorney Tom Harvey, who is following the case for The News, McQueary’s email claims are a “defense attorney’s dream.”

“Assuming the email is not a hoax, he’s making statements that are inconsistent with prior statements,” Harvey said.