Iovani Alatini is charged with assault. Prosecutors say he was arguing with his wife while she was driving, and at one point kicked the steering wheel.
Their SUV slammed into the median on the H-1 Freeway airport viaduct and flipped several times. Alatini's wife was pinned inside.
But on Tuesday, Lise Solomua-Alatini testified she crashed because she was driving under the influence and was busy punching her husband.
"He didn't kick the steering wheel intentionally," the defendant's wife said. "He kicked the DVD player. His foot slipped and hit the steering wheel. That's why I started hitting him and yelling at him."