Judge dismisses involuntary manslaughter case against Alec Baldwin

A judge dismissed the case against Alec Baldwin with prejudice due to withheld evidence by police and prosecutors. The ruling, which occurred about an hour ago, left Baldwin in tears. He was facing up to 18 months in prison if convicted in the shooting death of cinematographer Helena Hutchins.

What led to the judge's ruling in Baldwin's case?

How did Baldwin react to the judge's ruling?