It is said the mother died in 2011. When the daughter is interviewed, she said it was the first time they had talked in 10 years, since her mom died. Since it was 2019 and not 2021, she was off by two years.
M.C. Hammer's song, " U Can't Touch This" was playing in the opening scene, which was shown to be 1989. This song wasn't released until February 1990.
The new evidence given to the defense lawyer during trial would not be admitted without a formal hearing. Evidence must be made available for both sides to review and authenticate. After a hearing, the judge would make a ruling as to admissibility.
All of the NCIS personnel are shown sitting in court during the entire trial. In a criminal trial, witnesses are not allowed to sit and listen to other witnesses testimony, as that could influence their own testimony.
Torres "guy perpetually in need of a shave" look would be fine for field work, however it would violate NCIS grooming standards for court appearance.
Clarissa grants McGee "unlimited lives" in response to his recitation of the famous "Konami code" at the beginning of his visit. In reality, though, said code merely granted the player 30 lives ... not unlimited ones.