More details have emerged about the expected plea deal in the case of missing Colorado mother Kelsey Berreth.

KOAA reports that Krystal Lee Kenney, the Idaho nurse who was questioned in the investigation, is facing charges of tampering with physical evidence, and is due in court on Friday at 8:30.

Kenney, 32, has not yet been formally charged, but ABC News reports that she is expected to enter into a plea agreement, citing relatives who spoke to the news outlet on the condition of anonymity.

According to KOAA, the formal complaint filed Monday indicates that authorities believe Kenney, who lives in Twin Falls, Idaho, destroyed unspecified evidence on November 24, two days after Berreth’s Thanksgiving Day disappearance.

Berreth’s cell phone has not been found, but authorities have said that her phone pinged outside of Gooding, Idaho, after she disappeared in Woodland Park, Colorado, and that two text messages were sent from her phone on November 25: One to her employer, and one to Patrick Frazee, her fiance and the father of her child who is in custody facing multiple felony charges in connection to her presumed murder.

Frazee and Kenney are believed to have been previously romantically involved at some point, and had known each other for many years. Kenney is a divorced mother of two, and the precise nature of her relationship at the time of Berreth’s disappearance is unclear.

In addition to the murder charge, Frazee is facing three counts of solicitation to commit first-degree murder. The employers of one of Kenney’s friends came forward last month and claimed that the friend told them in October that Frazee had asked Kenney for help murdering a woman believed to be Berreth.