FARGO (AP) - The lawyer for a man convicted of threatening to kill President Bush says the verdict should be thrown out because the government's main witness wasn't credible.

Defense attorney Benjamin Thomas filed an appeal for Daniel Cvijanovich, who was found guilty earlier this month on one of three felony counts. Thomas said his client should be acquitted or granted a new trial.

Authorities said Cvijanovich threatened the president in November 2006 while he was serving time in a Jamestown jail. Thomas said the guilty verdict was based on statements by inmate Kyle White, who testified that Cvijanovich said he wanted to kill the president "so I will be famous."

Thomas said in his motion that White could not be believed because of his criminal history. Thomas said White acknowledged that he gave false information to police to stay out of jail and stole a long-distance calling card from Cvijanovich.

White has a "history of lying and stealing," Thomas said.

Thomas said the testimony also was tainted because White wanted to get his prison sentence reduced.

Prosecutors said White told authorities about the threats before it became a federal case and called Cvijanovich a dangerous man.

Cvijanovich faces up to 5 years in prison and a $250,000 fine. Sentencing is scheduled for Jan. 3.