REXBURG, Idaho (AP) — Authorities have searched the home of an Idaho man linked to the suspicious death of his first wife and the disappearance of his two new stepchildren.

On Friday, investigators with the Rexburg police, Fremont County sheriff’s office and FBI executed a search warrant on the house Chad Daybell shared with Tammy Daybell, who was found dead at home in October.

Initially thought to be a natural death, Tammy Daybell’s remains have since been exhumed in Utah, where she was buried. Autopsy results are pending.

The search warrant was also in connection to the disappearance of Joshua Vallow, 7, and Tylee Ryan, 17, who haven’t been seen since September.

The children’s mother, Lori Vallow — who is also now known as Lori Daybell — married Chad Daybell shortly after the other wife’s death.

Lori Daybell’s former spouse, Charles Vallow was killed in July in Arizona in a confrontation with her brother, Alex Cox. Cox, who died on Dec. 12, said he shot Vallow in self-defense.

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Authorities haven’t said why they got the warrant or what they found.

Rexburg police have said Chad and Lori Daybell are named as persons of interest because they never reported the kids missing, have repeatedly lied about where their children are — initially saying the boy with special needs was in Arizona — and aren’t cooperating with the investigation.

The couple has since issued a statement through an attorney, saying they love their son and daughter and look forward to addressing “allegations once they have moved beyond speculation and rumor.”

Chad Daybell, a member of The Church of Jesus Christ of Latter-day Saints, is a self-published author who writes about near-death experiences and doomsday events.

Chad and Lori Daybell participated in podcasts for a group called “Preparing a People,” which the group said involves “the second coming of Jesus Christ.” The group has since removed those podcasts.