A Michigan mom who fatally shot her three daughters with a rifle before killing herself had just taken the children out of school with a fake doctor’s note, police said.

Aubrianne Moore, 28, picked up the girls — Alaina Rau, 2, Cassidy Rodery, 6, and Kyrie Rodery, 8 — from their school last Monday. She fed them lunch before gunning them down with a hunting rifle in a wooded area in Solon Township, the Kent County Sheriff’s Office told Fox.

Moore then loaded the bodies of the slain children into her car and drove to her boyfriend’s home on 19 Mile Road, where she turned the gun on herself, police said. The coroner ruled the deaths a triple murder-suicide.

Moore, who had a history of mental illness, once kept her kids from school because she thought there was going to be a bus accident, according to a social worker who recommended Moore be hospitalized for paranoia back in September.

“Aubrianne is keeping her kids home from school because the television told her there would be a school bus accident today,” a social worker wrote in Newaygo County court records obtained by WOOD.

“Aubrianne stays awake at night believing people will break into her home. Aubrianne is not eating believing food is being poisoned.”

Moore agreed to be hospitalized at Forest View Psychiatric Hospital near Grand Rapids, but it’s not clear how much time she spent there. Moore left no suicide note, but investigators found “writings” indicating Moore thought she was protecting her children from something.

“She believes she was protecting the kids from something and most of her writings really followed kind of in that line,” Sheriff Michelle LaJoye-Young told WOOD.

“I don’t know what else to say. There’s no good answer here.”