CNN Forensic Files August 16, 2015 06:41:00
Sandy's known handwriting samples. he found it to be consistent. scientists found a fingerprint on the letter. it was sandy's. and dna testing confirmed that sandy licked the envelope to seal it. now that sandy claimed the incident was an attack, investigators reviewed hospital medical records and discovered that the attending physician doubted a horse had done that damage. >> they were semi-circular in nature and there were a number of them, and they put lacerations in her head, which she had to staple shut. and he said it just didn't look like any horse kick injury i'd ever seen. >> dr. john...