oksana says she has pictures

If you're a public figure, there's nothing worse for your reputation than to have an ex girlfriend tell the media that you're a violent sociopath. Actually there's one thing worse, and that is if you really are a violent sociopath, and she has the pictures to prove it.

(Oksana Grigorieva has) potentially explosive photos that will show her bloodied and bruised after a confrontation with (Mel Gibson).
Grigorieva received two black eyes and had two front teeth knocked out, the source, familiar with the case has told Radar Online.
"You can see Oksana's two main front teeth were broken and there are bruises all over her face," said the pal, who has seen the photos.
"They will come out eventually and she is prepared to use them in their court case."

The only thing I can say in Mels defense is that he's real religious and a raging alcoholic, and she has dark features and a spooky accent, so maybe one night he was drunk and thought she was a vampire. It's not the greatest defense in the world or anything, but "superstitious drunk asshole" might be as good as it's gonna get for this guy.