the 72-year-old faces several charges, including first degree murder, with a minimum sentence of life in prison if convicted. david? >> marci, thank you. when we come back, the new alert tonight about a treatment promising to fight off alzheimer's, dementia and the effects of aging. what we've learned. and what kind of animal attacked that beloved teacher? in a moment. of animal attacked that beloved teacher? in a moment. cerative colitis. but i realized something was missing... me. the thought of my symptoms returning was keeping me from being there for the people and things i love most. so, i talked to my doctor and learned humira can help get, and keep, uc under control when other medications haven't worked well enough. and it helps people achieve control that lasts so you could experience few or no symptoms. humira can lower your ability to fight infections, including tuberculosis. serious, sometimes fatal infections and cancers, including lymphoma, have happened; as have blood, liver, and nervous system problems, serious allergic reactions,