<p><br /> Online tabloid RadarOnline.com has released another recorded conversation allegedly between Mel Gibson and his ex-girlfriend Oksana Grigorieva.<br /> </p><p><br /> In the recorded rant, Gibson is allegedly heard on the tape saying that no one would believe Grigorieva's claims that Gibson hit her.<br /> </p><p><br /> The Los Angeles Sheriff's Department has announced that it is looking into extortion allegations against Grigorieva.<br /> </p><p><br /> Gibson and Grigorieva are locked in a bitter custody dispute over their infant daughter.<br /> </p><p><br /> Earlier this month the Los Angeles sheriff's department opened a domestic violence investigation against Gibson.<br /> </p>
