they ve revealed that early on in the investigation. there is also other information that prosecutor says that she is going to reveal, something she hinted at last night when she spoke to anderson cooper, saying that they were going to reveal information that could have prevented this attack. so we re waiting for her to step out here and start the press conference, which should begin momentarily, john. we ll come back to that when it happens. our illegal analyst, elliott williams, former prosecutor, karyn mcdonald is the prosecutor, four counts of involuntary manslaughter, charges brought quickly against jennifer and james crumbley. essentially, their son was having problems at school four days before this shooting. the father acknowledges he bought a pistol for the son. walk through how you build a case. involve tarry manslaughter is where someone commits a careless or reckless act that leads to