Jessica Marcum was sentenced to 12 years in prison by a Madison County judge.
Marcum was supposed to be babysitting her 9-month-old sister, Bella Rose, in June 2013. She said she held the baby’s head down to try and get her to go to sleep but ended up smothering her to death.
Bella Rose later died at the hospital.
Marcum, who was 17 at the time of the crime, originally claimed the death was accidental.
She was charged as an adult.
Marcum faced life in prison but pleaded guilty as part of a deal for the lesser charge of first degree manslaughter.
As part of the deal, prosecutors recommended a 12 year prison sentence.
The judge agreed.
Marcum, who is now 18, will have to serve at least 85% of her sentence which would be ten years because it is considered a violent crime.
The judge said probation was not an option.
Neither Marcum’s attorneys nor family wanted to talk on camera but when her mother was asked if she still loves and supports her daughter she said: how do I choose, she’s still my daughter.