Undescribable. What had she seen . Was this drowning really an accident . Shes got a huge gash on her head. Its not consistent with falling down. A husband and father is suddenly under suspicion. Hes crying, were crying. He said, they think i hurt mom. Three daughters stand by their dad. And one prosecutor stands firm. Hes holding his wife of almost three decades under water. My job is to get justice for christy hall. Was it murder . Hello and welcome to dateline extra. Im craig melvin. In this hour, a story that calls to mind the master of suspense, a plot straight out of an Alfred Hitchcock film. A young woman peers into her neighbor apartments yard and sees something for a few sektds. A man, a woman and something that is unsettling. Was it some kind of accident, a crime . Maybe even a murder . What she saw and what she did would set in motion a chain of events that would divide a family and a jury. Heres keith morrison. We know the truth and we know everything that happened. How do