WASHINGTON COUNTY, Tenn. -

The investigation has been completed into the death of a Washington County, Tennessee inmate.

District Attorney Tony Clark says the Grand Jury found  no wrongdoing from the Washington County Sheriff's department.

Stewart Peppers died at the Johnson City Medical Center. An autopsy report says Peppers died due to excited delirium syndrome.

Excited delirium arises most commonly in male subjects with a history of serious mental illness or acute or chronic drug abuse. Alcohol withdrawal or head trauma may also contribute to the condition.

The Tennessee Bureau of Investigation has been looking into the case since April.