Patrick Clancy took the stand in Lindsay Clancy's murder trial as jurors heard his 911 call and were shown disturbing evidence, including the exercise bands prosecutors say were used in the killings and the children's clothing. With the defense and prosecution presenting starkly different accounts of Clancy's mental state, the jury must decide whether she is criminally responsible for the deaths of her three children. Court TV's Vinnie Politan Investigates.