An Oregon mother has pleaded guilty to murdering her 6-year-old son by throwing the boy off a bridge. Jillian McCabe was sentenced to life in prison, with the possibility of parole after 25 years. According to the prosecutor, Jillian McCabe had planned the murder for weeks and researched insanity defenses online. Investigators said her cell phone and computer also showed she scoured the Internet for articles on parents that have thrown their children from bridges.