HONOLULU -- Steve Oshiro said he wants the chance to go to trial and blame his company -- Roberts Hawaii -- for an accident that killed an expectant father. But the judge Wednesday refused to let him back out of a plea agreement and sent him to prison.

More than two years ago Oshiro's tour bus killed 42-year-old Corey Voss in a head-on collision. In January, Oshiro pleaded no contest to manslaughter in return for parole in 10 years, but on Wednesday his lawyer argued that the plea deal was illegal.

“There is no plea agreement. There is no contract. There is no contract,” defense attorney Michael Green said.

Oshiro was not drug tested after the accident. It happened not long after a video was shot by tourists, terrified by his erratic driving. He said he was exhausted by the hours he was forced to drive by Roberts.

But the prosecutor said he knew what he was doing when he made the deal and going to trial now would be horrible for witnesses and Voss' family.

“They've moved on as best they could and now we get the opportunity to reinconvenience them or revictimize them or retraumatize them and go start living through this whole thing yet a year later,” Honolulu prosecutor Peter Carlisle said.

Judge Dexter Del Rosario agreed with the prosecutor and immediately sentenced Oshiro who passed on his chance to explain or apologize.

Oshiro said he planned to appeal and didn't want any statement used against him. The prosecutor said the judge’s decision upholds his ability to make binding plea agreements.

“In the courthouse the change the lawyer game is played by a lot of defendants. Give him his trial. What's the big deal?” Carlisle said.

Through her attorney Corey Voss' widow Asa said she is pleased the sentencing is over and she has a chance to move on. Corey and Asa Voss' daughter, born after he died, is now 26 months old. The family has settled civil lawsuits against Oshiro and Roberts.