'THE O.J. TAPES' AIRS ON ABC NEWS' '20/20,' SATURDAY, JUNE 4

It's been over 20 years now since football legend OJ Simpson was found not guilty of murdering his ex-wife Nicole Brown Simpson and her friend Ron Goldman in his criminal trial. In that famous televised trial, Simpson evoked his right against self-incrimination by not taking the stand. Yet, in the civil trial brought against him, Simpson was forced to testify under oath for the first time on tape, answering the tough questions about his tumultuous relationship with Nicole, the murders, the shoes, the glove, the Bronco chase, and more.

For 13 days, Simpson sat in a law office conference room behind closed doors, his deposition recorded on VHS. Those tapes were part of a treasure trove of almost 150 boxes. "20/20" takes a closer look at these tapes, unearthed by filmmakers and featured in two documentaries on A&E and LMN.

Elizabeth Vargas' report also features fascinating interviews with key players, including Ronald Goldman's father, Fred Goldman, and sister Kim Goldman; Nicole Brown Simpson's younger sister, Tanya Brown; Daniel Petrocelli, Fred Goldman's attorney who handled the civil case; A&E/LMN filmmakers Steven Auerbach, Chuck Braverman, and Lawrence Schiller; ABC News legal analyst Dan Abrams, who became a household name covering the trial for Court TV; and Nicole Brown Simpson's close friend and OJ Simpson's lawyer Robert Kardashian's, wife Kris Jenner. The hour also features rarely seen home photos and video, as well as audio of Robert Kardashian and O.J. Simpson.

Viewers will not only hear Simpson answer the tough questions, they will see his body language and gestures caught on camera and be able to form their own opinions as to whether OJ did it or not.

Additionally, viewers will see a preview of ESPN Films gripping new 30 for 30 Documentary event, "O.J.: Made in America." Part 1 premieres on ABC on June 11, and Parts 2-5 air on ESPN beginning June 14.

"The OJ Tapes" air on "20/20," SATURDAY, JUNE 4 (8:00-9:00 p.m. EDT) on ABC. (Rebroadcast. ABC OAD: 9/25/15)

"20/20" is anchored by Elizabeth Vargas and David Muir. David Sloan is senior executive producer.