and we had hoped that, you know, whatever mistakes were made from the first trial, they d learn from them and prepare for them and do better. two big differences this time around. first, skyler moore aka c-styles was on trial along with derek. although each defendant had his own jury. and second, derek s jury would not see c-styles disputed videotaped confession. it was ruled inadmissible. so prosecutors focused on derek s motive. here was a man, they told the jury, who d do almost anything to avoid paying child support. crystal and her five-month unborn son were killed with one gunshot. one gunshot to the back of her head. that, said the prosecution, fit a pattern. they called derek s old girlfriend traci williamson, who repeated her story that the first time she was pregnant with derek s child, she was attacked by a man she didn t know.
reporter: that, said the prosecution, fit a pattern. they called derek s old girlfriend traci williamson, who repeated her story that the first time she was pregnant with derek s child, she was attacked by a man she didn t know. he put a knife to my throat. did he cut you with the knife? yes. reporter: and then, during her second pregnancy, a second attack. somebody came and socked me in the face. and i went on the side of the car, and somebody stomped me on my stomach and my face. reporter: then, derek s own daughter took the stand against him. she didn t testify in the first trial, but she told this jury that derek seemed to hate being a father. he would come during major occasions, um, birthdays and things like that. he was very ill-tempered. he didn t spend much time with