A 13-year-old girl in Augusta County is accused of poisoning her adoptive mother over a two-day period, authorities said.

Augusta County Sheriff's Office Investigator Paul McCormick said the rescue squad found a sick woman at her Craigsville home on Thursday.

He said he suspects the teenager put ant poison in her adoptive mom's soda and apple butter starting on Wednesday and ending on Thursday afternoon.

In addition, he said, tick and flea poison is another possible substance given to the woman.

The investigator said from interviews with family and friends, he gathered the teen and the adoptive mother were not getting along.

According to McCormick, the woman could have died, if a family friend hadn't called police with concerns over possible poisoning.

McCormick said this is a very rare case in the area.

"This is unique. I've been with the Sheriff's Office for 13 years, in investigation for seven and this is the first time that I worked the case where a juvenile attempting to poison an adult so I would say no. It's relatively uncommon," said McCormick.

The teenager was released from detention on Friday but she will be going to trial for this case, according to McCormick.

She could face from five to 20 years in prison for adulteration of food with intent to kill someone, if the Commonwealth's Attorney decides to try her as an adult.

McCormick said deputies have contacted the Valley Community Services Board and Social Services to provide services when appropriate.

 Follow Estephany Escobar on Facebook and Twitter

© Copyright 2013 WHSV / Gray Television Group, Inc. All Rights Reserved.