confront bd lacy s still grieving mother and siblings. and why was he in court? here s kayna whitworth. reporter: it with us a case that horrified the nation. and tonight, scott peterson is back in court. long after the christmas eve murders of his wife lacy and unborn son, scott peter zone in court today, because the california supreme court overturned peterson s death sentence last year, ruling jurors in his original trial were improperly screened for bias about the death penalty. because of that, peterson no longer faces the death penalty. the judge today resentencing him to life in prison without parole. and lacy peterson s heartbroken family once again finding themselves in court with the man who killed their daughter. lacy s mother confronting him, telling him, quote, lacy and connor will always be dead and you will always be their murderer. peterson sitting in silence. lacy s sister in tears, telling hip, it makes me sick being here today in front of you again. nearly 20 years