The lawsuit said that the girl had suffered an undetected closed-head injury a month earlier when she fell down the stairs and hit her head at her mother's Grayling home.
Her mother took her to an emergency room, and two days later, to a pediatrician, who conducted a visual examination.
The mother and daughter moved into David Ferris' home three days before the death.
The night before she died, Kalla vomited. David Ferris thought she had an upset stomach and put her back in bed.
The next morning, her mother found her unresponsive.
[..]
He said medical examiners failed to determine the age of Kalla's injuries and did not identify bronchopneumonia and lung sepsis as a contributing factor. Ormsby concluded the injuries causing the death came earlier, probably in the January 2013 fall.
Renowned forensic pathologist and neuropathologist L. J. Dragovic then conducted a pro-bono review and found many errors in the autopsy, the lawsuit said.
She "died of bronchopneumonia complicating her head trauma," which occurred at least three days, possibly weeks, before the death, the lawsuit said.
Prosecutors dismissed charges on Nov. 13, 2014.