No... It's not.
It's from an image of his actual statement given when arrested (hand written).
Sorry Charlie... I mean Chucky. ;-)
Correction... yes, the image of Compean's handwritten statement is included in a DHS-OIG report. I don't believe that they fabricated it.... although they did misrepresent it, IMO, multiple times in the report when they attempted to 'summarize' it.