Mel Gibson, under investigation for domestic violence, admits to hitting Oksana Grigorieva and TWICE threatens to kill her in an explosive new audio tape obtained and released exclusively by RadarOnline.com. The enraged actor tells the mother of his eight-month old daughter Lucia “you deserved it” after she says that he hit her and broke her teeth. Mel’s stunning admission could be a powerful piece of evidence against him in the criminal investigation that is headed for the district attorney’s office and right now being conducted by the LA County Sherriff’s Department. The new tape features a ranting, out-of-control, Mel who screams and is so enraged at times that all he can do is pant heavily, seemingly incapable of speaking. It is one of the most powerful, crazed and bizarre episodes ever caught on tape from a major Hollywood star. You can listen to the tape here exclusively on RadarOnline.com.