On Sunday afternoon at about 4 p.m., a state trooper was posted outside the Ney Avenue crime scene. He said investigators were inside with family members.
A woman leaned against a truck parked in the driveway, talking on a cell phone and crying.
Investigator Chad Tangorra came outside briefly to say the 13-year-old was a family friend who had been babysitting.
He and other members of the state police would not release the name or gender of the 13-year-old suspect.
Tangorra would not say whether Melissa's mother, Irene Calhoun, was in the house when the incident happened, but did say the mother was home when the child was found to be dead.
The autopsy showed Melissa died of blunt-force trauma to the back of the head, Oneida County Coroner Stephen Wolanin said Sunday.
There was no evidence of other injuries, such as bone breaks or fractures, Wolanin said.
Irene Calhoun attended Grace Episcopal Church in Utica Sunday morning, church officials said.
Organist and choirmaster Bruce Smith said Irene Calhoun had been a member of his choir for one season a few years ago, but had to stop because she had so many other commitments.
Smith said as soon as Irene Calhoun entered the church Sunday, she was “immediately surrounded by lots of people in the church who knew her.”
Police have said the 13-year-old had been charged with second-degree manslaughter and was transported to an undisclosed detention facility.
Second-degree manslaughter is a charge applied when a person recklessly causes the death of another person. It is not premeditated.