LOGAN, Ohio (WTVN) -- A Hocking County woman faces several charges after video of her abusing her grandchildren was shown to authorities.

Hocking County Sheriff Lanny North says detectives were alerted to the abuse on Wednesday. The investigation found that Karen Sharpe, 54, of New Straitsville hit one granddaughter and forced another to hold a soiled pair of underware in her mouth.

Sharpe has custody of the girls, according to North. A 13 year old girl was allegedly hit in the face by Sharpe so hard that she had a large amount of bruising.

Deputies say Sharpe also became so upset with her 11 year old granddaughter for stepping on an injured foot that she forced the girl to the floor and stuffed a soiled paid of men's underware in her mouth, then used tape to keep it in place. A news release says that the girl was allowed to stand up and vomited from the fecal matter in the undergarment. Sharpe then told the girl to "swallow it." She also cursed at the children.

Video of the indicent was recorded and given to detectives. North described it as graphic in nature and said it would not be made public to protect the children from further harm.

Sharpe was arrested without incident and taken to the Southeastern Ohio Regional Jail in Nelsonville. She is charged with kidnapping, two counts of endangering children, assault, and domestic violence.