 Opening arguments scheduled to begin today in the trial of actor Alec Baldwin, charged with felony involuntary manslaughter over a deadly movie set shooting. Twelve jurors and four alternates will decide the fate of Alec Baldwin. Opening statements get underway today in his involuntary manslaughter trial. It's been nearly three years since cinematographer Helena Hutchins was killed in an on-set shooting. While the case has been highly publicized, jurors reported having the ability to be impartial.