A new report suggests that accused killer Patrick Frazee may have been involved with a woman believed to be a key witness — or possibly an accomplice — in the presumed murder of Kelsey Berreth long before the Colorado mother disappeared.

As CrimeOnline previously reported, multiple sources have said that authorities are investigating a woman in Idaho in connection to the case. She is reportedly a nurse from Twin Falls, and she has not been publicly identified. ABC News reported that the woman is believed to have played a role in the disposal of Berreth’s cell phone. The phone pinged outside of Gooding, Idaho, about 40 miles from Twin Falls, on November 25, three days after Berreth went missing.

At this time, Frazee is the only person who has been charged in connection to Berreth’s Thanksgiving Day disappearance. In addition to murder charges, Frazee, who is the father of Berreth’s 1-year-old daughter, was charged with three separate counts of solicitation of first-degree murder. In announcing his arrest in late December, authorities said that additional arrests were a strong possibility.

The Daily Mail reportedly spoke to two people who have worked with the Idaho woman, and they said that she and Frazee had been involved for quite some time, possibly as far back as 2016 and before Frazee and Berreth’s daughter was born. The unnamed sources said that Frazee met the woman at a rodeo.

One of the sources reportedly said that the Idaho woman had traveled to Colorado over the Thanksgiving holiday, speculating that she likely took the cell phone with her back to Idaho.

Colorado authorities have said they believe Berreth was killed at her home in Woodland Park, possibly during a robbery attempt.

Berreth’s body has not been located.