A mother in Michigan struggling with paranoia and hallucinations killed her three daughters with a hunting rifle before turning the gun on herself, authorities said.

Aubrianne Moore, 28, shot her three daughters — Kyrie Rodery, 8, Cassidy Rodery, 6, and Alaina Rau, 2 — with a bolt-action hunting rifle in a wooded area in Solon Township before putting their bodies into her car and driving them to a home in the 200 block of 19 Mile Road, where Moore then got out of the car and took her own life, Kent County sheriff’s officials told MLive.com.

Moore had been suffering from mental health issues prior to the killings. A social worker requested in September that she be hospitalized for paranoia, as well as visual and auditory hallucinations.

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

Kent County Sheriff’s Sgt. Joel Roon said investigators recovered the gun used by Moore in what a coroner later ruled was a triple murder-suicide.

Sheriff Michelle LaJoye-Young told WOOD that Moore picked up her two elder daughters from school at about noon Monday before stopping for lunch. She then took all three of her daughters to a property in Solon Township owned by the girls’ great-grandparents.

Once there, Moore used her boyfriend’s hunting rifle to kill her daughters, leaving behind three spent shell casings in a wooded area behind the home. Moore then drove to her boyfriend’s nearby home and shot herself outside of the vehicle, WOOD reports.

“We were able to pretty accurately put together the timeline of everything that happened from the time the kids were picked up from school until the time the bodies were found, so we’re very certain that there wasn’t any opportunity for anyone else [to be involved],” LaJoye-Young told the station. “Plus the ballistics were consistent with the suicide [and] the three murders.”

Moore did not leave a suicide note, but the sheriff said investigators did find recent writings that were troubling.

“She believes she was protecting the kids from something and most of her writings really followed kind of in that line,” LaJoye-Young said. “I don’t know what else to say. There’s no good answer here.”

Moore agreed to be hospitalized, but it’s unclear how long she received care at Forest View Psychiatric Hospital near Grand Rapids, WOOD reports.

The girls’ uncle, Joseph Graham, said they will be remembered as “beautiful angels” whose mother was neglected by doctors. He’s now trying to raise at least $15,000 for funeral costs and related legal matters. As of early Thursday, the online fundraiser had surpassed $6,000.

“If all you can do is pray and pass the word on, we can prevent this from ever happening again,” Graham wrote.