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WASHINGTON (WUSA9) -- Friday, a 26-year-old woman pleaded guilty to manslaughter in the death of a baby in a D.C. convent.

According to court officials, Sosefina Amoa admitted that she killed her infant son shortly after giving birth last year. Authorities say the child was born a week after she moved into a convent in Northeast D.C.

According to a proffer of facts, Amoa arrived in the United States from Samoa on Oct. 5, 2013. She entered a program to become a member of the Little Sisters of the Poor, an international congregation of Roman Catholic women who provide worldwide service to the elderly poor. She moved into the Little Sisters of the Poor's convent to receive religious classes, learn doctrine, experience prayer and community life, and care for residents.

On Oct. 10, 2013, Amoa asked to be excused from her duties and went to her room, according to the proffer of facts. She delivered the baby in her room that morning and then cleaned the room to try to hide the birth, say authorities. The next morning, she showed on of the Sisters the baby in her room. The Sister knew that the infant was dead.

Authorities say Amoa gave conflicting accounts to the Sisters and police about what happened. Then, Oct. 16, 2013, she told police that the baby fell to the floor after she gave birth. She got on the floor next to the baby. Amoa told police she didn't know what to do, and was afraid that someone would hear crying and learn of her pregnancy so she placed a wool garment over the baby's nose and mouth. She told them she applied pressure with her hand for two to three minutes.

The District of Columbia Office of the Medical Examiner determined that the cause of death was asphyxia. The medical examiner determined that the infant was fully developed and full term. There was also evidence in the lungs that the baby had cried and had been alive. The examiner also found bruising and scratches to the infant's nostrils.

Amoa is set for sentencing on May 23.

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