Judge dismisses involuntary manslaughter case against Alec Baldwin

The judge in the involuntary manslaughter trial of actor Alec Baldwin dismissed the case after the defense claimed that prosecutors withheld evidence. The dramatic development came after the judge held a hearing on a motion to dismiss by Baldwin's defense team, which claimed that prosecutors withheld evidence about ammunition on the "Rust" movie set. NBC News' Chloe Melas reports.