Day 51 was marked by prosecution missteps and the beginning of a systematic dismantling of evidence handling procedures. The defense brought sanctions motions for discovery violations, while prosecutor Goldberg was caught violating exhibit restrictions twice in a single afternoon. Dennis Fung's marathon direct testimony dominated the afternoon, detailing evidence collection protocols, but Barry Scheck's emerging cross-examination revealed that evidence forms were reconstructed months after collection rather than completed contemporaneously, and that Fung had omitted any mention of trainee Andrea Mazzola's involvement in evidence collection from his grand jury and preliminary hearing testimony.

• Defense files three sanctions motions against prosecution for late disclosure of videotape, shoe investigation materials, and testimony violations
• Judge Ito orders disclosure of Andrea Mazzola blood-collection demonstration videotape
• Prosecution violates exhibit restrictions twice in same afternoon by displaying airline ticket items subject to exclusion agreement
• Dennis Fung begins extensive direct examination covering detailed evidence collection, drying, packaging, and chain of custody procedures
• Scheck establishes during cross-examination that evidence collection forms were reconstructed 2-3 months after collection, not completed contemporaneously
• Video evidence reveals Andrea Mazzola collecting items without changing gloves between samples
• Fung admits omitting Mazzola from grand jury and preliminary hearing testimony, instead describing himself as sole evidence collector