“She thought that [Matheny] may not be dead so she went into the bathroom and filled the bathtub,” the report read. “She drug [Matheny} into the bathroom and placed her into the tub.”
The woman said she held her grandmother underwater for 15 minutes in the bathtub, according to the police report.
When a detective asked whether she was aggravated with her grandmother the woman said she was “aggravated with the situation.”
“[Detective Brian] Carpenter asked her what was her realization after she walked out of the bathroom,” the report said. “She said she is at peace.”
The woman is being held in the Preble County Jail. Formal charges are pending from the Preble County Prosecutor’s Office, according to Eaton police.
There are no other suspects in the case, which remains under investigation.