Authorities in Twin Falls, Idaho, have joined the investigation into the presumed murder of Colorado mother Kelsey Berreth, last seen on Thanksgiving Day near her home in Woodland Park.

Berreth’s fiance Patrick Frazee has been charged with first-degree murder and was taken into custody on Friday. At a news conference announcing his arrest, Colorado authorities said they believe Berreth, who shares a 1-year-old daughter with Frazee, is no longer alive, and that the alleged crime likely took place at her home.

Investigators have not yet found a body, and an additional charge against Frazee for solicitation of murder suggests that another individual or individuals were involved in the crime. On Saturday night, as reported by KOAA, the Twin Falls Police Department released a statement announcing that authorities were “processing some items of evidence” and preparing search warrants in connection to the investigation. 

The statement does not specify the type of evidence that has been discovered. As CrimeOnline previously reported, Berreth’s cell phone signal “pinged” outside of Gooding, Idaho, on November 25, three days after she went missing. The same day, Berreth’s employer and Frazee reportedly received text messages from Berreth’s phone.

Prior to Frazee’s arrest, authorities searched his 35-acre property in Florissant, about 15 miles from Woodland Park, and did not find Berreth there. Investigators conducted multiple follow-up searches of Frazee’s property before appearing to shift the focus of the investigation to Berreth’s townhouse. Multiple agencies were involved in a search of Berreth’s home on Thursday night, before Frazee was taken into custody in the early hours of Friday morning.

This is a developing story. CrimeOnline will provide further update when more information is available.