ETA: I believe PF may have used the "ulcer" as a ruse to get KB outside of town in the middle of the night, and perhaps killed by maybe an alleged drive by shooting, but gave up on that idea. (It was previously reported that KB and child were out all night before her murder checking on cattle and delivering Rx to PF and didn't get home until 4AM).
From 9 news courthouse update:
During Adams’ testimony, the court heard a recorded interview with Frazee on Dec. 2 -- the day Berreth was reported missing. In the conversation, Frazee was heard saying that he and Berreth had broken up and exchanged their daughter at random locations depending on their work schedules.
He said Berreth sought treatment for alcohol abuse, and that he last saw on her Thanksgiving when they exchanged custody of their daughter.
Adams said Berreth’s mother claimed her daughter had been with Frazee the night before her disappearance. That evening, Berreth’s mother said her daughter called again to say Frazee had given her her gun back, and that she had gone target shooting.
This was notable, according to Adams’ testimony, because Frazee first took away Berreth’s firearm in late 2017 after she made comments about taking her own life during a fight.
But Slater said Kenney claimed Frazee tried to use the gun as a piece of evidence to make it appear that Berreth had taken her own life, rather than been the victim of foul play.
CBI: Idaho nurse claimed Patrick Frazee fatally beat Kelsey Berreth, burned her body