A day after police discovered human remains in a Federal Heights home, they announced an arrest in the case: the victim's daughter.

The remains were discovered on Jan. 10 after police obtained a search warrant for the house, located at 10022 Eliot Circle in Federal Heights.

On Thursday, the remains were identified as the resident of the home, 69-year-old William "Bill" Mussack.

Bill Mussack.
Bill Mussack.

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Mussack's daughter, Dayna Jennings, has been arrested on first-degree murder charges related to his death, police announced Thursday.

Jennings, 44, lived with Mussack in the home, police said.

Police began investigating after receiving concerns from family members about Mussack in late December.

Dayna Mussack.
Dayna Mussack.

Relatives told police they hadn't had contact with him since early in the month.

"During interviews with family members and additional investigation, a number of concerns regarding the welfare of the missing person arose," police said in a press release.

Public records show Jennings owned a massaged business called The Good Massage, first based in Brighton, and most recently Commerce City.

The owner of the business that had leased a room to Jennings for her to conduct massages, said she had been acting strangely before unexpectedly quitting recently.

A message on Jennings' website reads "Dayna is taking personal leave for a few months to tend to family and personal needs..." The timestamp of the message shows it was posted three and a half weeks before Jennings' father was reported missing.

An autopsy was completed, but Mussack's cause of death has not yet been released.

The DA's office says it has not yet formally charged Jennings.

Police would not release documents pertaining to the case.