A forensic document examiner was merely offering his opinion — not asserting facts — in a law review article discussing how to evaluate credentials of handwriting experts, a federal appeals court held. The 7th U.S. Circuit Court of Appeals last week declined to revive a defamation lawsuit the Board of Forensic Document Examiners Inc. and seven of its members brought against author Thomas Vastrick and other defendants. Vastrick’s article, “Forensic Handwriting Comparison Examination in the Courtroom,” ran in the summer …