Three Knox County Sheriff's Office leaders — David Amburn, James Hammond and Aaron Yarnell — won unanimous retirement approval June 22 after May felony indictments, with benefits set to begin July 1.
County policy bars pension collection only after a felony conviction, not while charges are pending, so the board approved the applications after finding all three met service requirements.
The men are among 11 people tied to the sheriff's office charged in a corruption probe alleging more than $300,000 in improper credit-card purchases and over $30,000 in seized drug cash was misspent.
If convicted, they could lose their pensions and face clawbacks of county retirement contributions, alongside prison exposure on theft and conspiracy counts that carry sentences ranging from 8 to 25 years.
The case grew out of yearslong scrutiny of the department's narcotics unit after former unit leader David Henderson was convicted federally in August 2025, before the TBI brought broader state charges.