ROGERS COUNTY, Oklahoma - The Oklahoma State Bureau of Investigation is joining deputies and DHS in the investigation of a 9-year-old girl's death in Rogers County.

Her family said the girl went to bed sick Wednesday night and when they tried to wake her up Thursday morning her body was stiff and cold.

The Rogers County Sheriff's Office confirmed there was a previous case of violence involving the girl and a sibling.

DHS said it can't comment.