Three people have been charged in connection with the discovery of a "mummified" corpse found in a shed at a Knoxville residence, police said.

One of the three suspects was also charged with threatening the life of her young son as authorities searched the home.

Knoxville police officers responded Sunday night to a report of a possible homicide at 2306 Greenfield Lane .

"After obtaining a search warrant of the property, a deceased body was found wrapped in a tarp inside a shed on the property in a mummified state, suggesting the body had been there for multiple weeks," a Knoxville Police Department news release stated.

Court records identify the victim as a 62-year-old man. Authorities have not released his name publicly, pending notification of family.

Police confirmed the victim had not been reported missing prior to the grisly discovery Sunday.

Three residents in the home — Tommy Wayne Rose, 62; Deborah Maria Gister, 41; and Christina Barbara McCormack, 48 — each are charged with abuse of a corpse and tampering with evidence.

All three denied any knowledge of the victim's death.

Gister also is charged with aggravated assault for threatening to kill her 7-year-old son with a screwdriver as the residents were being detained outside during the search of the home, according to an arrest warrant.

"The defendant put the screwdriver to her son's neck and said, 'I have nothing else to live for and I will never be separated from my son,'" the warrant states.

Police were able to disarm Gister.

"Officers then had to force the child away from the defendant for his safety," the warrant reads. "When officers got control of the child, he stated, 'She tried to kill me.'"

The body was taken to the Regional Forensic Center for an autopsy to determine the cause of death.

The investigation is ongoing.