In an interview segment in the episode, Amy explained that her grandfather had a drinking problem, which caused issues for the family. She said that he eventually drank antifreeze and died, before explaining that her uncle was the one who gave it to him. She went on to claim that this case was documented in Murder on the Heartland, a book that chronicles murders that took place across the Midwest.

After fans heard Amy divulge the details of this salacious case so casually on the show, many wanted to know more about it and whether it was actually true. Some fans wanted to get their hands on the book immediately, while others were dubious about whether Amy's story was actually true.

"Also heard this although I think she was joking and actually just talking about the book," one person wrote.

It looks like Amy is telling the truth, although she may have the volume wrong. Murder in the Heartland Vol. 2, Harry Spiller's sequel to the first installment, tells the story of Amy's grandfather's death.

According to reporting from 1986 in a local Indiana paper, Charles H. Ellis did indeed murder his father by spiking his iced tea with antifreeze.

"Ellis became ill at his home the morning of Nov. 6 after drinking some iced tea. Authorities said it was thought at first that Ellis had suffered a stroke. He was taken to Pearce Hospital in Eldorado," a newspaper clipping from the time explains.

Charles H. Ellis was eventually brought up on three counts of murder after his father's condition deteriorated in the hospital.