Mel Gibson's lawyer is slamming his client's baby mama Oksana Grigorieva for "making sensational allegations."

Grigorieva, who obtained a restraining order against Gibson, claims that he once punched her so hard he knocked some of her teeth out. But according to the actor's lawyer Stephen Kolodny, her story is B.S. and she's making up lies to gain more custody of their eight month old daughter Lucia.

"Having entered into an agreement that allows for overnight, unrestricted visitation, and would soon result in Mel having 50/50 custody of their daughter an agreement reached after a two-day mediation with two retired Superior Court judges, Mel was hopeful their break-up was behind them and Lucia would be the beneficiary of co-operative parenting," Stephen said.

"Apparently Lucia will be denied that good fortune. Making sensational allegations is not the way to resolve this. Mel wants a custody settlement or a resolution in court, not the media."