Day 30 was consumed entirely by Rosa Maria Lopez, a neighbor housekeeper and key defense alibi witness. Prosecutor Darden methodically attacked her credibility through cross-examination, alleging she misidentified times, was coached by defense investigators, and had financial motives. Defense attorney Cochran rehabilitated her on redirect, attributing inconsistencies to cultural misunderstandings, severe sleep deprivation, and language barriers. The day was marked by fierce sidebars over evidentiary admissibility and tactical maneuvering on both sides, ending with Lopez discharged and her testimony preserved.

• Darden attacks Rosa Lopez's credibility on three fronts: reliability of clocks used to establish timeline, contradictions with earlier recorded interview with defense investigator Pavelic, and alleged financial inducements
• Tape of defense investigator Bill Pavelic's interview with Lopez played to expose contradictions between her trial testimony and earlier statements about specific times
• Cochran rehabilitates Lopez on redirect by explaining cultural naming traditions, establishing severe sleep deprivation (3 hours over 2 days), and noting that Pavelic doesn't speak Spanish
• Heated sidebar dispute over admissibility of Dr. Vincent D. Gilley's letter regarding Spanish-language witness responses
• Bench viewing of videotape showing alleged Cochran gestures triggers contentious sidebar argument
• Lopez discharged with testimony conditionally preserved due to her impending departure from jurisdiction