Oksana Grigorieva's Lawyer ......... 'She Told the Truth'

Oksana Grigorieva just walked out of a marathon deposition -- about 7 hours long -- but O.G. has much more she wants to say, according to her attorney, Daniel Horowitz.


On his way to the parking lot, Horowitz told us about Oksana's long day getting grilled by Mel Gibson's attorneys ... and said she's looking forward to telling the world everything.

Mel will get his turn to open up -- to lawyers -- when he sits down for his long-delayed deposition on Monday.