>> reporter: i'm nick watt for "nightline" in hollywood. >> thank you! >> it was english actor and academy award winner peter yusanov who said, comedy is simply a funny way of being serious. we wish chris rock serious tune into gma monday morning. as always we're online 24/7 on >>> now, new york's number one news, channel 7 news. >>> a knock on the door and moments later an 81-year-old woman was dead. family pleading for help to find her killer. good evening at 11:00, the question tonight who killed the 81-year-old woman. mystery. city with more. >> reporter: well, police in the and prosecutors office released new surveillance video hoping it will help in the case, they have also put up this digital board hoping that someone knows something and will come forward to help solve this murder mystery. prosecutors belief you're look -- believe you're looking at a murderer just minutes before he took the life of an elderly woman saturday february 5th, around 10:30 p.m. when this man showed up at her door in jersey city. >> he rang the bell, and apparently said
