jury, was that devastating? it didn t feel complete. it didn t feel like justice. it just felt empty. reporter: it could have ended right there. but the d.a. had a message for andrea and her attorneys. he looked at me and he said, i m doin this again. that day? that day. that minute. reporter: andrea was determined to testify again. this wasn t just about her. it was also about cosby s other accusers. women came out into the public, into the media in droves saying that they had, too, been drugged and sexually assaulted. and i believe the women. i believe the women. reporter: and for trial number two she would have more support. the judge ruled that five women, with stories of drugging and assault similar to andrea s, could also testify. it was a big win for the prosecution. four of those women spoke to us: janice baker-kinney, lise-lotte lublin, heidi thomas and chelan lasha. i was like, thank you, somebody s listening.
she testified later in court that she called cosby to confront him. what s that phone call like? well, it was a two and a half hour conversation. what was your tone? well, i was very, very angry. very, very angry. reporter: throughout the call, she says, he called her mom. he tried to lead her to believe the sexual act with andrea was consensual. it was a lot of game playing, a lot of manipulation, my conversation with him. and i think when i said to him, you know what? i said, it s it s best you re truthful. it s best you re honest. reporter: gianna says cosby asked to have andrea pick up the other line, she did. and they say he made a startling admission. he said, i m sorry, andrea. and i m sorry mom. reporter: gianna wasn t having it. i was yelling and saying to him, you re sick. you re a sick man and that, he he agreed.
reporter: it was early 2005 after the d.a. decided not to press charges against bill cosby, andrea decided to hire two suburban philadelphia lawyers. when andrea called me in 2005, little could i imagine that we d still be on this journey in 2018. reporter: bebe kivitz and dolores troiani had years of experience helping survivors of sexual assault. after andrea s story made news, other women privately reached out with similar accusations. you start hearing from a lot of women. right. thirteen.// all of whom tell tell you what? well, some of them were consensual relationships, but everyone had the same story, which is, i m with bill cosby, and the next thing i know, i drank something or i take a pill and i m out. reporter: in march 2005, andrea sued cosby in a civil lawsuit.
victim. reporter: in december of 2015, bill cosby was arraigned on three counts of aggravated indecent assault. mr. cosby you want to say anything? reporter: cosby pleaded not guilty. mr. cosby how do you feel, sir? reporter: with a trial looming, andrea would have to take the witness stand and relive her nightmare. reporter: the battle moves to the courthouse. and andrea is under fire. the defense argued that you wanted money. were you in it for money? reporter: when dateline continues. is a game changer. it s going to let the dentist offer their patient sensitivity relief in 3 days. say over the course of a weekend you re going to start feeling significant results.
cosby went on trial in a courthouse outside philadelphia for sexually assaulting andrea constand 13 years earlier. mr. cosby, are you confident today, sir? reporter: finally, it was time for andrea to tell her story to a jury. as well as i held myself, a part of me was nervous that i would have to, again, go through this traumatic incident that happened to me all over again. live through it again. yes. reporter: on the stand she recounted that night back in 2004 at cosby s home. when she finished, his defense team challenged her story, zeroing in on inconsistenices. on the sixth day of deliberating, the jury announced it was hopelessly deadlocked. today a pennsylania judge declared a mistrial. when you heard it was a hung