"I read somewhere that some of Libby's notes recovered by Fitz were on a hard drive that Libby thought he had wiped clean. That would be enough for an obstruction indictment."
Maybe an indictment, but that's a long way from a conviction. He would have to have corroborating evidence showing that Libby purposely deleted the files in order to conceal information from the prosecutor.
exaclty. shredding working papers is common practice.
NOTE TO SELF: set "default" on secure delete to overwrite 38 times rather than 3 and rewrite with hash and then zeroes.