Police said Clayton Mibroda, 25, beat his newborn daughter, Natalee, more than once, but the man's family said it was an accident.
Mibroda was charged with criminal homicide after Natalee died on Tuesday at the Indiana Regional Medical Center. According to the coroner, officials found "multiple and extensive physical injuries to the baby's body."
The official cause of death is listed as blunt force trauma to the head and chest.
"It's very upsetting to think somebody we knew around here in the community would have done something like that," said neighbor Bob Frain.
Frain said he called 911 on Tuesday when the victim's great grandmother ran to his house for help.
Investigators said Mibroda gave conflicting stories about how his daughter was injured. Police said he first claimed that his daughter was choking so he gave her CPR.
Mibroda later said he was frustrated with Natalee because she was crying and that he accidentally dropped her and kicked her in the head while getting a bottle.
The Indiana County coroner said the injuries were inconsistent with a single incidence of accidental trauma.
Family members told police the girl's injuries were an accident. But police said the girl had injuries that happened at least a day before the fatal assault.
Mibroda is being held in the Westmoreland County Jail.