Federal prosecutors say a supervisor who managed security at a South Carolina prison accepted more than $219,000 in bribes over three years and got 173 contraband cellphones for inmates.

Christine Mary Livingston, 46, was indicted earlier this month on 15 charges including bribery, conspiracy, wire fraud and money laundering.

Livingston worked for the South Carolina Department of Corrections for 16 years. She was promoted to captain at Broad River Correctional Institution in 2016, which put her in charge of security at the medium-security Columbia prison, investigators said.

Livingston worked with an inmate, 33-year-old Jerell Reaves, to accept bribes for cellphones and other contraband accessories. They would take $1,000 to $7,000 over the smart phone Cash App money transfer program for a phone, according to the federal indictment unsealed Thursday.

Reaves was known as Hell Rell and Livingston was known as Hell Rell’s Queen, federal prosecutors said.

Both face up to 20 years in prison, a $250,000 fine and an order to pay back the money they earned illegally if convicted.