A Franklin County judge warned a 54-year-old Kennewick man to stay out of trouble after he completes his prison sentence on a robbery conviction.

Moses Cornelious Sanders picked up his second "strike" offense Tuesday in Franklin County Superior Court after entering an Alford plea of guilty to first-degree robbery.

"You need to be very careful," Judge Craig Matheson told him. "The sentence on a third strike would be life without parole."

Sanders got his first strike under the state's "three strikes" law when he was convicted in 1982 of first-degree robbery.

In the current case, Sanders was arrested Aug. 20, 2010, after he and another man robbed the Family Mart Conoco on Fourth Avenue, court documents said.

Sanders wrote in court documents that he was entering an Alford plea because while he thinks he is innocent, he believed there was sufficient evidence to convict him if he took the case to trial.

Matheson sentenced him to eight years and four months in prison.

Sanders' co-defendant, Billy Wayne Davis, 66, of Pasco, was convicted by a jury last week of first-degree robbery with a firearm.

Davis is being held without bail in the Franklin County jail. He picked up his third strike with the conviction and faces a life sentence.

Sanders and Davis were arrested shortly after the early-morning robbery at Conoco.

Davis used a BB gun that was modified to look like a rifle and pointed it at the clerk during the hold-up, documents said. Sanders then took $304 in bills and coins.

Sanders said he handed the money to Davis before they ran out of the store, documents said. They were found hiding in Volunteer Park, which is across the street from the jail.