GLENS FALLS -- The 5-year-old boy who was critically injured by his mother's boyfriend Thursday died early Saturday at Albany Medical Center, officials said.
Glens Falls Police received notification early Saturday that Gary Carpenter III had died, Police Chief Will Valenza said.
An autopsy was to be performed at Albany Medical Center later Saturday, according to Glens Falls Police Detective Sgt. Peter Casertino. Results were not available Saturday evening.
"We'll get an idea from the autopsy of the level of abuse and how long it was going on," Valenza said.
The death will likely result in the man suspected of injuring Carpenter, Brandon M. Warrington, 24, facing upgraded homicide charges, possibly as weighty as second-degree murder.
Warren County District Attorney Kate Hogan said whether additional charges will be filed will be left up to a Warren County grand jury.
She said a schedule for the grand jury action was not available, but the case would be presented in the coming days.
Warrington and Carpenter's mother, Jennie M. Mattison, 23, were arrested late Thursday, hours after the lifeless 5-year-old was taken from their Mission Street, Glens Falls apartment with a severe head injury.
Warrington was charged with felony counts of first-degree assault and first-degree reckless endangerment, while Mattison was charged with first-degree reckless endangerment.
Court records allege that Warrington pulled the boy's feet out from under him, causing him to hit his head, then shoved him to the floor a second time, resulting in a second blow to the head.
Police said he was "disciplining" the boy for a behavior issue, then became upset that he would not stop crying.
The reckless endangerment counts accuse the two of waiting 30 to 45 minutes before calling for medical help despite the boy's obvious head injuries.
Police were initially told Carpenter fell and hit his head, but later were told about the incidents in which Warrington is alleged to have hurt him.
Carpenter, who was known by the nickname "Little Wolfy," after his biological father, had been pronounced brain dead as of Friday morning, authorities said.
Meanwhile, The Post-Star has learned that Washington County Child Protective Services had recently investigated a child abuse complaint that involved the boy, but Warrington was not the suspected abuser. The outcome of that report was not available early Saturday.
"There was a CPS report involving the child," Valenza confirmed.
Warrington and Mattison were both on probation for a misdemeanor conviction related to the theft of metal grave markers from area cemeteries earlier this year.
Police records show the couple had moved four times over the past 14 months, moving from Fort Edward to Hudson Falls to Queensbury to Glens Falls.
They had moved to Glens Falls within the past two weeks.
It was unclear in which county the couple were on probation. The metal thefts stretched over three counties, and they were charged in multiple jurisdictions.
Both are in Warren County Jail for lack of bail pending Tuesday appearances in Glens Falls City Court.