An Illinois teen faces charges after she allegedly shot her mother to death and then enlisted the help of a friend to burn down the home to destroy the evidence.

Police said Anna Schroeder, 15, waited with a .38 revolver for her mom Peggy Schroeder, 53, to come home from work Thursday in Morrison, Illinois.

When her mom arrived, Anna reportedly asked her to put a towel over her face before fatally shooting her in the head in the living room, according to the testimony of a police officer reported on by the Sauk Valley News.

It is unclear what the motive was behind the alleged murder.

Anna then allegedly texted her friend Rachel Helm, also 15, that she had killed her mother. When Rachel didn’t believe her, Anna sent a photo of her mom’s body, according to the police officer’s testimony.

Rachel, who lives in nearby Rock Falls, got a ride to the Schroeder house from her own mother later that night.

The girls then allegedly attempted to clean blood out of the carpet before going to sleep, according to the testimony.

The next day, the teens allegedly moved Peggy Schroeder’s body from the living room to her bedroom and covered her with a sheet.

The two girls bought more cleaning supplies, but ultimately decided Saturday to set the house on fire to cover up the evidence before going their separate ways, the officer said.

Firefighters responded to the home ablaze Saturday afternoon where they found the 53-year-old’s body, according to news station KWQC.

Rachel allegedly became so guilt-ridden that she confessed the entire series of events to her mom, who took her to the Whiteside County Sheriff’s Department for questioning.

During this time, Anna posted a message on her deceased mom’s Facebook page, the Sauk Valley News reported.

“I don’t even know if you can see me right now but if you can I just want you to know you were my best friend,” she wrote. ” I wasn’t always the best daughter and I’m so sorry. I love you so much mom I just want you to know and I’ll never forget you.”

Anna, who was at her father’s home, was brought to Bureau County Sheriff’s Department where she broke down and admitted to the killing, the officer testified.

Both girls were taken into custody at Mary Davis Detention Home in Galesburg.

Anna was charged Tuesday with two counts of first-degree murder, concealment of homicidal death and arson. Her friend Rachel has not been formally charged.

They are scheduled to appear in court Aug. 8.