[Ray76]

Understandable.

Also listed are:

• Signature Verification
• Anonymous Letter Evaluation
• Detection of Document Alterations
• Computerized Document Evaluation
• Forgery Investigation
• Restoration of Erasures and Obliterations
• Indented Writing Investigation
• Typewriting Examination

(emphasis added)

http://reedwrite.com/?page_id=133

Investigation need not be limited to "PDF compression"

[Jeff Winston]

I’d be interested in seeing the report, if there is one.

Not that I’m expecting anything really new.

[Jeff Winston]

Or, to put it another way: