>> that call is 100% fake. there's no question about it. >> not only was the mom lying to 911 about when the murder occurred, but no, argued the defense, she was lying about something much bigger. who the true killer was. the defense attorney saved his surprise for closing arguments. >> it was an unusual moment. certainly i knew there were many supporters of gene tan in the courtroom, and i was going to basically suggest to the jurors that she had pulled the trigger. >> gene tan, the mom, the wife, the true killer. the defense said the shotgun was in her hand. she pulled the trigger. she solved her own problem. not her son. that was the story the defense say will be 11th hour. >> not an easy thing to do in a packed courtroom where. >> according to the defense, it was gene tan who had the motive, the moetive to get rid of her bully husband, get the house, the business, the money. >> frankly it put motive in gene's hands, category more so