Kelsey Berreth’s 1-year-old daughter taken into protective custody

"As you can tell by the arrest, sadly, we do not believe Kelsey is still alive", Woodland Park Police Chief Miles De Young said Friday during a press conference.

Last week, Frazee's attorney, Jeremy Loew, said his client "continues to cooperate with law enforcement in the missing person investigation", ABC reported.

Frazee has been booked on a charge of first-degree murder and solicitation of first-degree murder, but officials explained it may be about 10 days before he is formally charged, according to Dan May, attorney general for Colorado's 4th Judicial District.

Investigators believe Berreth, 29, is dead after going missing almost a month ago.

Berreth, a 29-year-old mother of a 1-year-old girl, was last seen on Thanksgiving in the area of her Woodland Park home.

Berreth, a licensed pilot and flight instructor, was last seen shopping at a supermarket with her one-year-daughter and police released surveillance video showing her entering the Woodland Park supermarket.

She is in protective custody and will be reunited with Berreth's family, he said.

Police said that a search of Berreth's home on Thursday night turned up "suspicious" items and brought them to a point where they could arrest Frazee.

Investigators have not yet located Berreth's body, but they believe she may have been killed in her Woodland Park home.

Frazee, who did not live with Kelsey, told police that he last saw his fiancée on that same Thanksgiving Day when they met up so he could take their daughter in an exchange.

De Young declined comment on what led to the solicitation to commit murder charge. Frazee's arraignment has yet to be set, May said. Federal Bureau of Investigation agents, meanwhile, were at the home of Berreth in Woodland Park on Wednesday.

The Woodland Park Police Department and the Teller County Sheriff's Office conducted the arrest together and it went without incident. Asked by a reporter if additional arrests will be made, De Young said it's an "absolute possibility".

"So, it isn't just a discussion", the prosecutor said.

Ms Berreth's employer, Doss Aviation, received a text message from her cellphone that day saying she planned to take the following week off. Frazee told police that Berreth last texted him on November 25, the Sunday after Thanksgiving. "This is completely out of character", Cheryl Berreth said.

He said Cheryl Berreth reported her daughter missing at 12:37 p.m. MT on December 2. Kelsey loves her God, she loves her family and friends, and she loves her job.

Berreth's phone did end up in Idaho, De Young confirmed Friday, adding that police are still working to recover it.