The Mississippi Bureau of Narcotics has arrested a Tutwiler prison guard in a continuing heroin investigation, according to MBN Director John Dowdy.

MBN agents over the weekend arrested Cynthia D. Smith, 37, of Clarksdale at the Tallahatchie County Correctional Facility, a private prison in Tutwiler run by California-based Corrections Corporation of America.

A search warrant executed at Smith’s residence uncovered 12 ounces of black tar heroin, two ounces of pharmaceutical-grade marijuana and a significant about of cash, Director Dowdy said.

“This heroin seizure is substantial in terms of quantity and is a clear indicator that no part of our state is immune from this deadly drug,” Director Dowdy said.

Smith is charged with possession of heroin with intent to distribute, possession of marijuana with intent to distribute and conspiracy to possess heroin.

The suspect was transported to the Coahoma County jail, where she was booked and held under a $150,000 bond.

Batesville and Clarksdale police departments assisted the MBN in the arrest.