The murder of BYU professor Kay Mortensen, motivated by his collection of guns, will be the subject of a television newsmagazine show this Sunday.

“On The Case With Paula Zahn,” which airs on the Investigation Discovery Channel, will take on the story of the bizarre murder. Originally, Mortensen’s son and daughter-in-law were charged with the grisly death and even jailed after walking in on the murder in progress. On March 5, Martin Bond was sentenced to life without parole for the murder. During the trial, the Roger and Pam Mortensen, Kay’s son and daughter-in-law, spoke out about how being falsely accused ruined their lives.

“Because of your actions, my wife and I were blamed for a crime we did not commit,” Roger Mortensen said to Bond in a court address before sentencing. “We spent four and a half months in jail. Our relationships with family and friends were destroyed, my wife lost her job, our vehicles were repossessed, our reputations were ruined in our church and in our community while you watched it happen and bragged about it.”

The television program will feature interviews with Kay’s widow, Darla Mortensen, Kay’s sister, Fern Caka, along with Pam’s mother, attorneys, family, friends and members of the Utah County Attorney’s Office and the Utah County Sheriff’s Office. Zahn is an Emmy Award-winning journalist.

Producers, who could not be reached for an interview, describe the show this way: “It was 7:48 p.m. on Nov. 16, 2009, when the Utah County Sheriff’s Department responded to a 911 call reporting a homicide. When they arrived, they found 70-year-old Kay Mortensen, a retired Brigham Young University professor of mechanical engineering, kneeling head-first in his bathtub, stabbed to death. Detectives talked with Kay’s son, Roger, and Roger’s wife, Pam, who said they had been held hostage at gunpoint by the two men who had killed Kay. A search of the home revealed no signs of forced entry and the murder weapon was a butcher knife taken from the kitchen. The couple’s story didn’t add up with the evidence police found at the scene, especially because the only fingerprints found near the victim’s body were Roger’s. Police built what appeared to be an airtight case against the couple. But just as their trial was set to begin, the district attorney received a phone call that raised the question that everything Roger and Pam had told them had been the truth all along.”