A 26-year-old woman shot her parents and then herself in their Pennsylvania home in what investigators say was a plan the three of them had planned.

On the morning of January 25, police attended a home in West Manchester after three bodies were found found in the backyardthe York County Coroner’s report said.

Husband and wife James and Deborah Daub were shot in the head by their 26-year-old daughter, Morgan Daub, who then turned the gun on herself, the report said.

But further investigation revealed that the double-murder suicide was not a sudden decision and that all three family members were apparently involved.

“After a detailed investigation and evidence found at the scene, including reports from family members, it was determined that the three family members had pre-planned their deaths,” the coroner’s statement said.

Officials would not comment on what might have prompted the family to come up with the plan.

Considering the already available evidence, no autopsies will be conducted, the coroner said.

The incident remains under investigation, the West Manchester Police Department said.

“It is believed that the situation family event and employees continue to investigate and gather information about this tragedy,” the agency said. “Our thoughts and prayers go out to the friends and families of the Oaks.”

West Manchester Township is about 105 miles west of downtown Philadelphia.

A 26-year-old woman shot her parents and then herself in their Pennsylvania home in what investigators say was a plan the three of them had planned.

On the morning of January 25, police attended a home in West Manchester after three bodies were found found in the backyardthe York County Coroner’s report said.

Husband and wife James and Deborah Daub were shot in the head by their 26-year-old daughter, Morgan Daub, who then turned the gun on herself, the report said.

But further investigation revealed that the double-murder suicide was not a sudden decision and that all three family members were apparently involved.

“After a detailed investigation and evidence found at the scene, including reports from family members, it was determined that the three family members had pre-planned their deaths,” the coroner’s statement said.

Officials would not comment on what might have prompted the family to come up with the plan.

Considering the already available evidence, no autopsies will be conducted, the coroner said.

The incident remains under investigation, the West Manchester Police Department said.

“It is believed that the situation family event and employees continue to investigate and gather information about this tragedy,” the agency said. “Our thoughts and prayers go out to the friends and families of the Oaks.”

West Manchester Township is about 105 miles west of downtown Philadelphia.