The arrests were carried out by the MCSO together with the North Mississippi Narcotics Unit as part of an ongoing investigation into illegal drug activity in Monroe County.
Gunn was charged with sale of a controlled substance, possession of crack-cocaine with intent to sell, possession of powder cocaine with intent to sell and child endangerment (2 counts).
Legrone was charged with conspiracy to sell crack-cocaine, conspiracy to sell powder cocaine and child endangerment (2 counts).
"When agents arrived they found Terrance M. Gunn in possession of crack-cocaine, possession of powder cocaine," the statement said.
"Ciera Kaint Legrone had prior knowledge and allowed the above activity of possession of controlled substance and the sell of controlled substance to take place inside the home while her two minor children were present."
They are being held at the Monroe County Detention Center awaiting arraignment.