A federal judge has refused to throw out the prison sentence of an Ohio telemarketing millionaire who was convicted of witness tampering but acquitted on charges related to campaign contributions made by employees, relatives and others. 74-year-old Benjamin Suarez has served most of his 15-month sentence at a minimum-security facility in West Virginia. Suarez sought to have his sentence vacated, arguing he had ineffective legal counsel. That motion was denied this week by a judge in Cleveland who concluded documentation and testimony in the case contradicts the businessman's arguments. Suarez ran Suarez Corporation Industries in North Canton.