In an interview with CNN, White described the elder Barnett as someone he had known for more than 30 years. "He's a man that I do consider to be a friend," the sheriff said. But he described as "absolutely shameful" any suggestion that Barnett would have tried to influence the investigation into his grandson.
Melinda Coleman said White had initially told her that other girls had come forward to accuse the same group of boys of similar conduct but changed his story. "He said that they were all liars. I digitally recorded him saying they were all liars and that they just wanted to crucify those poor, innocent boys.
"So my concern is what is it going to take for them to do something here? Is one of these girls going to have to die? Are they going to end up freezing in their frontyard before they will do something?"
Melinda Coleman said she would like the case to be reopened. "I would like to see some justice," she said. "And I would like the other girls to be able to come forward without fear."
On Tuesday, a spokeswoman for Missouri's attorney general said her office cannot reopen the case.
"Charging decisions in criminal cases are placed within the discretion of elected county prosecutors in Missouri. State law provides the Attorney General's Office with no authority to review or overrule a prosecutor's charging decisions," said Nanci Gonder.
In the weeks that followed her daughter's alleged assault, Melinda Coleman said her children received threats and she was fired from her job as a veterinarian at a clinic.
The Colemans have since picked up and moved from the town in northwest Missouri, about 100 miles north of Kansas City.
In April, their house in Maryville -- which had been vacant and for sale -- burned. The state fire marshal said that, "due to the unsafe nature of the structure, a detailed examination could not be conducted and this fire loss is being listed as undetermined."