WORCESTER, Mass. (AP) -- All Massachusetts authorities could say for sure is that they found the lifeless body of a small boy, apparently cast off the side of a highway.
An autopsy should reveal if the child is Jeremiah Oliver, the Fitchburg 5-year-old missing for months before police learned of his disappearance and began looking for him. Jeremiah's case has led to criminal charges against his mother and her boyfriend and calls for changes within the state's child welfare agency. Three state workers have been fired.
"What we know right now is that a young child has died, and that his body has been disposed of in a heartless way," Gov. Deval Patrick said in a statement Friday. "As we await news about the child's identity, as Governor and as a parent, I feel a deep sadness."
The body found off a highway in central Massachusetts matched Jeremiah's height and weight, authorities said. Worcester County District Attorney Joseph Early Jr. said authorities can't make a positive identification until the state medical examiner conducts an autopsy.
"It appears to be a homicide," the prosecutor said at a news conference.
Jeremiah was last seen by relatives in September but wasn't reported missing until December. Authorities have said they feared he was dead.
Early said the body was found at about 9 a.m. Friday by a police search team about 40 feet off Interstate 190 near Sterling, which is about 12 miles from Fitchburg.
He would not say what led authorities to the location, or how long the body may have been there. He said the site is near an area that is regularly mowed on the side of the highway but would not have been visible to passing cars.
Jeremiah's mother, Elsa Oliver, 28, pleaded not guilty in March to charges including kidnapping, assault and battery with a dangerous weapon, and reckless endangerment. Her boyfriend, Alberto Sierra, 23, pleaded not guilty to similar charges.
The family was being monitored by state social workers since 2011. And after Jeremiah's disappearance, their case led to intense scrutiny of the state Department of Children and families.
Three employees of the agency -- a social worker, a supervisor and an area manager -- were fired after an internal investigation. Officials said the social worker had not made required monthly visits to the family.
The governor asked the Child Welfare League of America to review DCF but resisted calls from some lawmakers to fire Olga Roche, the agency's commissioner.
In an initial report filed by the league last month, it recommended that Massachusetts take a number of steps to shore up its child welfare system, including boosting staffing levels to reduce social worker caseload.
A separate report from the state's Child Advocate, Gail Garinger, suggested that state social workers missed nearly one in five home visits during a recent 12-month period, though state officials said the figure was likely overstated.
Roche assured state legislators in January that DCF had accounted for the safety of all other young children in its care.
Oliver and Sierra, who were indicted by a Worcester County grand jury, are both being held on bail -- $100,000 for Oliver and $250,000 for Sierra.
Three other people have been charged with interfering with a criminal investigation and misleading police in connection with the case.