and they would not see c-styles videotaped confession. so prosecutors focused on derrick s motive. here is a man, they told the jury, who would do almost anything to avoid paying child support. krystal and her five month unborn child were killed with one gunshot. one gunshot, to the back of her head. that, said the prosecution, fit the pattern. they called derrick s old girlfriend tracy williamson, who repeated her story that the first time she was pregnant she was attacked by a man she didn t. no he put a knife to my throat. did he cut you with an? i ve yes. and then, during her second pregnancy, a second attack. somebody came and slapped me in the face. i went on the side of the car, and somebody stomped me on my stomach and my face. then, derrick s own daughter