Lt. Roy Renaud until recently worked at a county jail. He’s hoping he won’t be an inmate. On September 23, Renaud, a 20-year veteran of Worcester County (Mass.) Jail and House of Correction, resigned his post in the wake of evidence implicating him in the theft of an unspecified sum of funds from the union where he serves as treasurer, New England Police Benevolent Association Local 275. His departure came three days after he was placed on unpaid administrative leave. So far, it’s been a matter for internal affairs. “At this time we’re still in fact-finding mode and determining whether it should be referred to an outside agency,” said Jail Superintendent Shawn Jenkins, declining to comment on how the jail learned of the allegations. The union represents about 40 to 50 officers at the West Boylston correctional facility.