The Texas County Sheriff and his chief deputy have been indicted on eight charges.
Authorities say James Sigman and his chief deputy, Lieutenant Jennifer Tomaszewski, were romantically involved.
They're charged with assault, robbery, endangering the welfare of a child, unlawful use of a weapon, harassment, misuse of official information by a public servant, and false impersonation.
Sigman is in the Greene County Jail, while Tomaszewski is in the Shannon County Jail.
An investigation shows Tomaszewski threatened inmates and once hit a mentally disabled inmate so hard that she knocked him out.
Authorities say the pair also brought a child to the jail, where it was around sexual predators and other dangerous inmates.
The Missouri Attorney General’s Office served a search warrant in June.
The Texas County sheriff has been arrested for multiple felonies.
The Missouri Highway Patrol confirms Sheriff James Sigman and Lieutenant Jennifer Tomaszewski are booked on suspicion of assault, first degree robbery, first and second degree endangering the welfare of a child, unlawful use of a weapon, and harassment.
Formal charges have not been filed.
Sigman and Tomaszewski could also face misdemeanor charges of misuse of official information by a public servant and false impersonation.
Back in June, the Missouri Attorney General's Office confirmed it executed a search warrant at the sheriff's department in Houston, but would only say two employees were under scrutiny.