ABC News January 16, 2019

Search for missing Colorado mom Kelsey Berreth expands to landfill

WATCH: Investigators intensify search for the body of Colorado mother Kelsey Berreth

The search for evidence in the case of a missing Colorado mother authorities say was murdered by her fiancé now includes a landfill in Fountain, Colorado, ABC News has learned.

A spokeswoman for the Midway Landfill south of Colorado Springs confirmed the facility recently attracted the attention of investigators in the disappearance and presumed murder of 29-year old flight instructor Kelsey Berreth. Her body has not been found.

(MORE: Missing Colorado mom Kelsey Berreth's parents file wrongful death lawsuit against fiance Patrick Frazee)

“The Colorado Bureau of Investigation contacted Waste Management of Colorado regarding a potential search at Midway Landfill and we are cooperating fully,” Waste Management spokeswoman Anne Spitza told ABC News on Wednesday.

Chappin Everett/The Gazette via AP
Patrick Frazee leaves the Teller County District Court in Cripple Creek, Colo., Monday, Dec. 31, 2018. Frazee learned of the five charges against him during his brief court appearance Monday in Cripple Creek.

32-year old Patrick Frazee, described as Berreth’s fiancé and father of the couple’s one-year-old daughter, has been charged with her murder.

(MORE: Idaho nurse under investigation in case of missing Colorado mother Kelsey Berreth: Sources)

Spitza declined to answer additional questions about the timing of any search or what investigators are looking for, referring all questions to the district attorney’s office handling the case.

AP
In this Dec. 13, 2018 file photo, community members hold a candlelight vigil for Kelsey Berreth under the gazebo of Memorial Park in Woodland Park, Colo. Authorities say they have arrested the fiance of the Colorado woman who was last seen on Thanksgiving.

The Midway landfill is a roughly 40-mile drive from Woodland Park, where Berreth was last publicly seen shopping on Thanksgiving Day. Police say Frazee was the last person to see Berreth before she vanished.

(MORE: Authorities complete search on property of missing Colorado mom Kelsey Berreth's fiance)

On Dec. 21, Frazee was arrested on first-degree murder charges and three charges of solicitation to commit murder, though prosecutors have declined to provide additional details. Frazee has not entered a plea and is due back in court Feb. 19.

Representatives for district attorney Dan May and the Colorado Bureau of Investigation both declined to comment Wednesday.