Babysitter returned dead infant to mom and pretended he was alive, Wisconsin police say

/ CBS/AP

Wausau, Wis. — A Wisconsin babysitter who allegedly killed a 2-month-old boy then pretended he was alive when she gave the boy back to his mother has been charged with first-degree intentional homicide. A criminal complaint filed Friday says 28-year-old Marissa Tietsort of Wausau caused the infant's death in October, then put him in a snowsuit and car seat and returned him to his mother – without telling her the child was dead.

Authorities found the mother trying to revive the boy, but he had died hours earlier of blunt force head injuries from multiple impacts to the head. CBS affiliate WSAW, citing court documents, reports the baby's tailbone was broken off and displaced.

Marissa Tietsort WSAW

During a court appearance Friday, Judge Jill Falstad issued a $500,000 cash bond for Tietsort and ordered that she have no contact with children or with the victim's family.

WSAW reports Tietsort wrote a letter to Marathon County Judge Jill Falstad asking for a reduction in bond. In the letter, Tietsort said she's pregnant with her sixth child and is not getting proper prenatal care. "I'm not a monster," she wrote.

Tietsort, who is pregnant with her sixth child, also faces child abuse charges involving an 11-month-old girl in her care. That charge stems from an August incident. Tietsort was arrested in that case after the 2-month-old died in October.

A message left with the public defender's office hasn't been returned.

According to the criminal complaint, the mother of the 2-month-old boy dropped him and his older brother off at Tietsort's home on Oct. 18.

About two hours later, the baby's mother received a text from Tietsort, in which Tietsort told her that a local news website published a story saying she'd been charged with child abuse and she isn't supposed to have contact with children. Tietsort told the mother not to tell anyone she was watching her two sons.

When the victim's mother came to pick up her sons later, the infant was in his car seat with a hat pulled down over his eyes. The mother told police she thought he was sleeping, the complaint said.

The boy's mother later realized her son was not breathing, cold and stiff. Officers arrived to find the boy had "ashen skin tone, his jaw was clenched and his lips were blue."

Tietsort told police she didn't kill the baby, but knew he was dead, the complaint said. When her boyfriend got home that evening, they went to McDonald's and she brought the dead baby with them, according to the complaint.

After she gave the boy back to his mother, Tietsort, her boyfriend and their son went swimming at a local hotel, the complaint said.

First published on January 7, 2019

© 2019 CBS Interactive Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.

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