Gainesville police are investigating a man with a history of fraud charges in a possible scam to steal tax refunds from local clients. No charges have yet been filed against Richard Wilder in the suspected ruse, which may have ensnared at least one Hall County resident, but the tax preparation service he was operating on Shallowford Road is no longer open. Police spokesman Kevin Holbrook said investigators have received complaints against Freedom Tax Service and launched a criminal inquiry into the business and its proprietors, which includes Wilder’s father, Donald, in the last week or so.