A former high-ranking union official was sentenced Thursday to serve six months of a three-year probation sentence in home confinement for bilking more than $100,000 from smaller labor and employee groups and cheating on his taxes. A US District Court judge also ordered Kenneth Aurecchia of Johnston to pay a $40,000 fine. The 64-year-old will be subject to electronic monitoring during his home confinement. Prosecutors say Aurecchia bilked the system by getting advances for travel expenses from smaller groups tied to the United Association of Journeymen and Apprentices of the Plumbing and Pipe Fitting Industry while he was receiving union reimbursement for those costs. Aurecchia was a regional vice president with the association.