In a statement read by their attorney, the couple said that "everyone in the church should always seek adequate medical care for our children". The Mitchells were members of the Followers of Christ Church, and others from the congregation were present for the births. They were arrested in June 2017 and initially faced murder charges.
The Oregonian/OregonLive reports that Sarah Mitchell and her husband, Travis Lee Mitchell, were sentenced Monday to almost seven years in prison for the March 2017 death.
Sarah Mitchell's sister Shannon Hickman and her husband Dale Hickman were convicted in 2011 of manslaughter and sentenced to six years in prison for the death of their own newborn son. The newborn's lungs appeared to be "airless" when she suffered from acute respiratory distress syndrome, the medical examiner wrote.
This marked the fifth criminal case in Clackamas County, south of Portland, involving the death of a child from the religious community known as the Followers of Christ Church.
Sarah Mitchell's grandfather founded the church, which traces its roots to the Pentecostal movement of the late 19th century. Instead, one church elder contacted the Clackamas County Medical Examiner's Office after the girl's death.
Walter White, Sarah Mitchell's father and a leader in the church, signed the statement which will be posted inside the church for all members to read under the terms of the plea agreement.
Senior Deputy District Attorney Bryan Brock said the couple accepting responsibility and issuing a public statement was a "landmark resolution".
Under Idaho law, parents who cite religious reasons for not seeking medical help for their child cannot be prosecuted, even if their child's death was preventable with medical intervention.
Their now-16-month-old daughter remains in foster care but visited her parents during their incarceration.
Sarah Mitchell received no prenatal care and she did not know she was carrying twins until she gave birth at her grandparents' house at least several weeks early, prosecutors said.
It has around 1,000 members across Idaho and OR, and has its roots in the pentecostal church. Members believe in a literal translation of the Scripture, which states that faith will heal all and if someone dies, it is God's will.
The church drew criticism in 1998 after The Oregonian analyzed the deaths of 78 children buried in the church's graveyard since 1955.
On arriving, officers found that Evelyn was still in the house, and ordered her to be brought to a medical facility, where her life was saved.