The only new activity was the sight of investigators entering and leaving Kelsey's Berreth's home on Thursday night.

Law enforcement returned to the home of Kelsey Berreth on Thursday night. The missing Woodland Park mom hasn't been seen since Thanksgiving.

Police officers and agents with the Colorado Bureau of Investigation were seen going in and out of the home. 9NEWS reporter Jordan Chavez also spotted an evidence response team leaving the Woodland Park Police Department.

Investigators said they're following new information that comes in daily and are making progress in the case.

Berreth, 29, was last seen in surveillance video shopping at a Safeway store with her daughter in Woodland Park on Nov. 22.

On Tuesday, law enforcement followed up on a search warrant executed at the 35-acre, Florissant property of Patrick Frazee, Berreth's fiancé.

Susan Medina, a spokesperson for CBI, said she wasn't sure which agency was there, but that it was a "routine follow-up" and that there are still no arrests.

Cheryl Berreth, Kelsey Berreth's mom, first reported her missing on Dec. 2 after she contacted Frazee and said she had a difficult time getting ahold of her, according to law enforcement.

A multi-jurisdictional task force initially executed the search warrant at Frazee's property in Florissant last weekend, which is about 15 miles west of Woodland Park where Berreth was last spotted.

Woodland Park Police said in a release that the warrant is sealed and "there are no details available from the search."

Woodland Park Police Chief Miles De Young said investigators believe Frazee is the last person to have seen her in person when the two exchanged their 1-year-old child. Last week, Frazee said through his attorney that he voluntarily released his phone to law enforcement for a search and provided buccal swabs and photographs.

Berreth's phone pinged in Gooding, Idaho on Nov. 25. She has family in Idaho and Washington, according to a missing persons bulletin for the case.

The same day her phone pinged in Idaho, De Young said she sent a text to her employer and said she wouldn't be in the next week.

On Saturday, the Woodland Park Police Department said information leading to the location or safe return of Berreth is eligible for a $25,000 reward.

No suspects have been identified in the case, and the investigation is ongoing.