daniel holtzclaw. >> officer daniel holtzclaw. >> sexually abusing several women while he was on dutyhe object of so much public scrutiny and scorn, about to speak publicly for the first time. daniel holtzclaw had told "20/20" he wanted to talk on-camera, but authorities will not allow it. they say, for his own safety. a former cop behind bars is a target. what made you want to talk to us? >> i want people to hear from me. how do i respond to these questions? so they could see the truth. i have nothing to hide. >> reporter: you say you're not guilty. you're telling me you never raped any of those women? >> absolutely. >> reporter: have you ever sexually assaulted any woman? >> i have never sexually assaulted anyone. >> reporter: holtzclaw says not only did he not commit these crimes, there were no crimes. he insists the women, all 13 of them, are lying. he claims none of them were sexually assaulted by anyone. why would 13 women lie? >> detectives approached these women and said, "we have a tip that you've been sexually assaulted by an oklahoma city police officer. that's basically gi