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(WBIR-Knoxville) Knox County District Attorney's office confirmed Tuesday there won't be any criminal charges filed over automated phone calls that asked people their opinion of Republican Sen. Stacey Campfield.

Campfield requested the Tennessee Bureau of Investigation to look into the automated phone calls last month. He said he received emails from people who got up to 30 calls. Campfield said the reported calls may have violated anti-harassment laws.

TBI handed the matter over to Knox County District Attorney General Randy Nichols because in Tennessee in most cases a formal TBI investigation must be requested by the district attorney general in most cases.

John Gill, with the Knox County DA office, said Nichols reviewed the request and determined that criminal charges weren't warranted.