Former nurse sentenced in friend’s insulin-overdose death after murder case shifted

Kacee Lyn Terry’s sister turned Meggan Sundwall’s sentencing into a blunt betrayal narrative, calling the former nurse a “wolf in sheep’s clothing” as the woman once trusted as a caregiver faced prison for helping drive Terry’s fatal insulin overdose. Terry was 38. Sundwall, a Santaquin resident who had been Terry’s best friend, stood in a Provo courtroom after a case that started as aggravated murder and ended with convictions for manslaughter and obstruction of justice.

Fourth District Judge Sean Petersen sentenced Sundwall to one to 15 years for manslaughter and zero to five years for obstruction of justice, with the terms running concurrently. The jury returned its verdict on March 24, 2026, after deliberating for parts of two days. The lesser outcome did not erase the core facts that defined the case for Terry’s family: a close friend, a medical professional, and a death tied to alleged manipulation, access, and trust.

The fatal incident happened on Aug. 12, 2024, in Highland, Utah, when Terry was found unresponsive in her bedroom. She was hospitalized in a diabetic coma and died five days later, on Aug. 17, 2024. Police and court reporting said Terry was not diabetic, even though a diabetic needle was found at the scene. Hospital staff later determined her blood sugar level was 14, a life-threatening reading.

Investigators also said Sundwall and Terry exchanged more than 28,000 text messages dating back to December 2019, with years of discussion about death, suicide, insulin and Terry’s supposed illness. Reporting in the case said Terry had been told she had terminal cancer, though she did not actually have cancer. Prosecutors said Sundwall believed she would benefit from a $1.5 million life insurance policy, and they argued she used that control to help steer the outcome.

Terry’s sister, Kylee Clark, testified that Terry had become afraid of Sundwall and moved out of the home after no longer feeling safe living there. Other court and police accounts said Sundwall discouraged calling 911 and told Terry’s uncle that Terry had a do-not-resuscitate order, while implying she had power of attorney. Investigators said no DNR order could be found and that no such authority had been given to her.

Before sentencing, Sundwall apologized and said, “I wish I could take it back.” She also acknowledged that encouraging and supporting suicide was morally wrong. The defense argued Terry may have died by suicide and said the state had not proven Sundwall administered the insulin, but the prison term left the case with the same cold center it had from the start: a trusted friend, a medical setting, and a death that still feels like a betrayal.