"Willie Robinson, in the last couple of days of his life, asked his parents to take him to a hospital and would say things like 'mommy, it hurts,'" said Ohio's Cuyahoga County prosecutor Bill Mason.
"They didn't take him," said Mason, citing police reports that are not public record in the state of Ohio until after an investigation is complete.
Willie died after collapsing at his parents' home in Cleveland March 22, 2008.
His parents, William Robinson and Monica Hussing, were indicted March 11 on charges of involuntary manslaughter, child endangering and felonious assault, according to court documents.
Attorney Margaret Isquick, who is representing the couple, did not return repeated calls made by ABCNews.com for comment.
Cuyahoga County coroner Frank Miller said that he ruled the death a homicide because it was so clear to him that the child had received no medical care before his death, despite obvious signs he was in grave condition.
Miller said Willie had been suffering from Hodgkin's lymphoma, one of the most treatable forms of cancer. The coroner said the cancer may have been curable had the child's parents sought the appropriate medical care.
"We were the first to diagnose him," said Miller. "This boy had not received any medical attention before he got to us."
"He had swelling in his neck and pneumonia when he died," said Miller. "He looked gaunt and pale and certainly would have appeared visibly ill to the average person."
Sheila Slawinski, the boy's aunt, said that she suspected something wasn't right with her nephew in the year before his death.
According to Slawinski, Willie first starting shows signs of illness in April 2007, when she said he had a noticeable lump on his neck.
"We were trying to get my sister to take him to the hospital because of the lump and he was just staying in his room and complaining," Slawinski told ABC News.
"He looked like Casper the ghost," she said. "He had blue circles all the way around his eyes."
Slawinski alleges that she was constantly telling her sister, who has five other children ranging in age from 6 to 15, to take Willie to a doctor and even offered to do it herself.
"He would stand at the bottom of the stairs and say that he needed help to get upstairs [to the bathroom] and my sister would tell him to get his a-- upstairs," said Slawinski.
When she finally confronted her sister, Slawinski said that the conversation quickly turned hostile, with Hussing telling her to "stay the f--- out of my life."
"I don't know what is wrong with my sister," she said. "I'm so embarrassed and ashamed that this happened."
Slawinski claims that her sister would promise to take Willie to the doctor but would never follow through.
In July 2007, Slawinski called to complain to the Trumble County Department of Child Services, hoping that it would force her sister to seek treatment for the boy.
Slawinski says she is not satisfied with the job the agency did in helping her family.
"They told me their job was to keep families together," said Slawinski.
Marilyn Paee, a department manager at the Trumble County Department of Child Services, confirmed to ABCNews.com that agents were working with Willie's family from July 2007 until Feb. 14, 2008 -- a month before the boy's death.