Tiede met the wealthy widow, Marjorie Nugent, in March 1990 at her husband's funeral, which Tiede had helped arrange as assistant director at Hawthorn Funeral Home. The two eventually became inseparable companions, although she was more than 40 years his senior. In 1991, Nugent altered her
will, and disinherited her only child, Rod Nugent, leaving her entire $10 million estate to Tiede. By 1993, Bernie left his job to work for Nugent full time as her business manager and travel companion. In November 1996, Tiede killed Nugent by shooting her in the back four times with a
.22 caliber rifle. He placed her body in a freezer used to store food at her Carthage home. According to the
Amarillo Globe-News, Nugent's estranged son, Rod, an
Amarillo pathologist, had grown concerned about not being able to reach his mother. After traveling to
Panola County nine months following her death, Rod declared Nugent a
missing person. He and his daughter entered his mother's house, where they found her body in the freezer. Tiede was taken in for questioning, and he admitted to Nugent's murder to police in August 1997. He said that after the murder, he had prepared the body, and placed it in a freezer. After this, Tiede acknowledged using Nugent's money for civic activities, gifts to academic and civic groups, and to friends. She had given him power of attorney over her funds. A jury convicted Tiede of
first-degree murder, and sentenced him to 50 years in prison. When he
appealed his sentence, the appellate courts ruled that there was sufficient evidence for the jury to have found premeditation, a condition of the charge. After the film
Bernie (2011) was released, attorney Jodi Cole became interested in Tiede's case and met with him, filing a post-conviction writ of
habeas corpus, in which Tiede alleged that his constitutional rights were violated in the first trial because of newly discovered evidence. He further alleged in the writ that the 81-year-old Nugent was controlling and emotionally abusive toward him, and that he had murdered her in a
dissociative state resulting from years of sexual abuse as a child by an uncle. The Texas Criminal Courts of Appeal approved the writ. According to Rod, Tiede had alienated Nugent from her family, friends, and business associates of her late husband. He told the
Globe-News: “It appears this Bernie Tiede kind of systematically estranged my mother from all these people one at a time ... At some point, they became angry with my mother.” ==Imprisonment and release==