knife to stab avis repeatedly and cut her throat. after the murder, carla got rid of the knife and her bloody clothes. and placed a second call to keyon shortly after 6:00 p.m., again, no one knows what was discussed. >> just leaving practice, i can't really talk. >> what shocked me the most, this woman has a child. how could a mother do that to another woman, and knew she was expecting? >> as for keyon pittman, he claims he played no part in planning or instigating the murder, and carla never implicated him in the crime. some speculate he learned about the murders after they happened, but, before he found avis' body. >> we felt like there was probably some conversation that night prior to keyon going home that led keyon to know that