Image credit: Isabella County Sheriff''s Office

A Michigan college student has admitted poisoning her roommate with bleach, according to an affidavit obtained by ABC News.

Kayla Ashlyn Bonkowski, who attends Central Michigan University, is accused of spraying bleach into her roommate's iced tea after an argument over dirty dishes last month, Michigan State Police said in a statement. The roommate, Emily Joseph, 20, filed a complaint against Bonkowski, 19.

After the incident, Joseph sought medical treatment and has since been released. Bonkowski, who hails from Mount Pleasant, Mich., was arrested, posted bond, and is now due to be arraigned on December 10.

The charge carries a maximum sentence of 15 years in prison.

According to the affidavit, Bonkowski "verbally admitted" to Michigan State Trooper Douglas Hunt that "she put bleach in the drink" because "Joseph is mean." Bonkowski, according to the affidavit, stated that "she knew that spraying the bleach was a serious thing."

Steven Smith, a spokesman for the university, said in a statement that the school was waiting for more information on the case.

"CMU is aware of the situation and is still awaiting a police report from the Michigan State Police, which is leading the criminal investigation," the university said in a statement. "The university continues to collect information and will follow the provisions of the student code of conduct in addressing this matter."

The Isabella County Prosecutor's Office and the Isabella County Sheriff's Office both declined to comment on the case, referring questions to the Michigan State Police.