Gibson reportedly unleashes a disgusting tirade aimed at Grigorieva -- calling her an embarrassment, using the n-word, and making misogynist remarks. Another rant allegedly includes threats that Gibson would burn the house down.
The tapes have not been made public. They reportedly have been submitted to the judge in their custody battle and are under seal.
Gibson's representatives are not commenting on the story. But the NAACP is speaking out, saying given Gibson's history, an apology just isn't enough.
"He has to spend some years doing some positive things for people in the community for other folks to show that he is not perhaps the racist or the sexist or anti-Semitic as his actions tend to show," said Leon Jenkins, president of the Los Angeles NAACP.
High profile attorney and women's right advocate Gloria Allred is also weighing in.
"If he does not get effective counseling I do think that he presents a serious risk of harm to women and to minorities because these words indicate that he may be very, very dangerous," said Allred.
Meanwhile, attorneys for Gibson and his ex-girlfriend have concluded a closed-door hearing with a judge handling their child custody case. Attorneys for the actor-director and Russian singer declined to comment on the case, which remains sealed.
The couple split in April. Gibson's attorney, Stephen Kolodny, says the former couple entered into a confidential agreement a month later and that Gibson is providing Grigorieva with substantial support. Oksana said in a statement that she cannot discuss the case.