An autopsy for a four-week-old Chattanooga girl who died March 4 said she died from blunt force injuries to her head and chest.
The report on Olivia Destiny Dunton found bruises on her face and head as well as skull fractures and rib fractures.
There was evidence of dehydration and nutritional deficiency.
Ivan Dunton, 26, earlier was charged with criminal homicide and aggravated child abuse.
Police said Dunton at first said the child fell down 13 steel/concrete stairs.
Police said he later admitted that he shook the child violently, then put her in a car seat and kicked it down a set of stairs.
He said the most damage happened when he shook her.
Dunton said the incident was prompted because he was mad at his girlfriend and the fact the girl would not stop crying. He said she did stop crying after he finished shaking her.
Chattanooga Police had responded on a Monday morning to a medical emergency call in the 2100 block of Raulston Street. Upon arrival CPD Officers found a baby receiving CPR. Hamilton County EMS responded and transported the baby to a local hospital where she was pronounced dead.
Through investigation, CPD Violent Crimes Investigators determined the incident location to be in the 2200 block of East 27th Street.