Alec Baldwin's involuntary manslaughter case was abruptly dismissed midtrial by Judge Mary Marlowe Sommer in New Mexico due to police and prosecutors withholding evidence, leading to a 'gargantuan win' for the actor. The judge found that key evidence related to the fatal shooting of Halyna Hutchins was intentionally withheld from Baldwin's defense, rendering the trial unfair and prompting emotional reactions from Baldwin and his family in court. The withheld ammunition, potentially favorable to Baldwin's case, was only revealed during the trial, leading to the case's collapse. The dismissal with prejudice means the charges cannot be refiled, marking the end of a nearly three-year legal saga surrounding the Rust film set tragedy.