heather jones's husband maintained that he knew nothing about what happened to her. hot on his trail. would it lead them to heather? here is andrea with the conclusion of "the last dance." >> for hours, chris jones had been going over his story with detectives about what happened the night his wife disappeared. but after cadaver dogs found the scent of human remains in chris' car, detective wallace wasn't buying his story. >> your story about what happened the night she disappeared, total [ bleep ]. >> wallace pushed him for the truth. >> how did it happen? did she fall? she did. was she drunk as [ bleep ]? what happened? >> that's exactly it. we were struggling over the phone. and only this time, we were outside on the steps. and she -- she lost her footing. she fell and hit the step. and i heard the -- heard the crack. >> he said they were struggling over a cell phone. she slipped, fell backwards and hit her head and died. >> did you believe this new story? >> no, no, no, no way. >> finally, chris admitted heather was dead. but insisted it was only an accident. sti