Amanda says she’s certain her father, Rex, was murdered. She says her father, who was suffering from pulmonary fibrosis, went into the hospital complaining of shortness of breath and died two weeks later. She claims she found a note he wrote six hours before he died that said, “She may be trying to kill me,” she started to investigate her father’s death. She says the medical records don’t add up and she wants justice for her dad.

TELL DR. PHIL YOUR STORY: Conflict so big it needs a Dr. Phil solution?

Dr. Phil is joined by Dr. Joel Kahn, cardiologist and professor of Cardiology at Wayne State University School of Medicine, who examined Rex’s medical records and autopsy report. In the video above, he explains his findings to Amanda about her father’s health conditions before his death and why he was given certain medications.

“He died of a heart attack in the setting of two other lethal conditions,” Dr. Kahn concludes.

WATCH: Why Woman Says Ex-Husband Wasn’t Murdered Even Though Daughter Claims He Was

How does Amanda respond to Dr. Kahn’s analysis? And, on Tuesday’s episode, what does Dr. Phil say Amanda needs to do so she can accept the reality about her father’s death and move on with her life? Check here to see where you can watch.

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Dr. Phil To Woman Obsessed With Dad’s Sudden Death: ‘I Think You Had Unfinished Emotional Business With Your Father’