According to East Idaho News, Isenberg pleaded guilty and was sentenced to five years in prison. Her daughters, Tracy Tesch, April Barnes, Amber Hosking, and Jessica Barnes, also pleaded guilty to their role in the crime. They were each sentenced to three years of probation and 100 hours of community service. They were also ordered to pay thousands of dollars in restitution and fines.

On top of this, Isenberg's husband's autopsy showed that he did not die from drowning. Instead, a massive overdose of more than 7,000 nanograms of diphenhydramine was found in his system, which hinted at a possible drug poisoning.

Investigators became extremely suspicious of Isenberg. They noticed she had begun liquidating her and her husband's joint accounts and planned on selling their house following his death.

They also noticed handwritten changes were made to his will a month before his death. Under these changes, 80 percent of his assets would go to Isenberg's children. Other evidence showed that Isenberg had tried to poison her husband prior to his death, and her search history showed she had researched topics related to the murder, including water currents, drowning, and boat accidents.

Prosecutors were also able to expose evidence that showed that she had spent weeks planning his murder, just to spare herself embarrassment after her embezzlement scheme became public. Isenberg claimed that her husband accidentally consumed a poisoned drink she had prepared for herself, as she planned to take her own life.