Day 106 centers on the direct examination of FBI fiber expert Douglas Deedrick but is dominated by a major discovery explosion: the defense uncovers a hidden five-page FBI report on Bronco carpet fiber rarity, triggering a preclusion motion. While the judge allows supporting photographs, the substantive rarity/source report is barred from evidence. Deedrick's lengthy methodology testimony proceeds amid repeated courtroom clashes over his use of the term 'match,' which violates FBI guidelines; the judge sustains defense objections and instructs the witness to cease. The defense also challenges the chain of custody foundation for Simpson's blood reference sample used in DNA comparisons, though the judge overrules that motion.

• Defense discovers five-page Deedrick report on Bronco carpet fiber rarity hidden in notebook
• Defense moves to preclude Deedrick's entire testimony due to discovery violation and altered photo labels
• Judge precludes Deedrick's rarity/source report from evidence but allows supporting photographs
• Deedrick's direct examination establishes FBI qualifications and hair/fiber analysis methodology
• Repeated courtroom battles over Deedrick's use of word 'match'; judge sustains objections and instructs witness
• Defense motion to strike DNA evidence based on chain of custody defects for blood reference sample overruled
• Judge rules Grisham novel with domestic violence themes may remain with sequestered jurors