The warrants describe how that morning, Penny was playing in a front room and her mother put her down for a nap with a bottle of milk about 11 a.m.
When Penny's mother checked on her about noon, she found her baby had purple or blue lips and was not responding, according to the search warrants. Penny's mother took her downstairs and attempted CPR.
Paramedics arrived and took Penny to Utah Valley Regional Medical Center, where she was declared deceased later.
While searching the home, police allegedly found "burnt foil with residue and burnt straws" in the room where Penny's parents stayed, according to the search warrant. Officers also allegedly found burnt straws on the carpet and on a coffee table in the living room, as well as burnt foil in a bathroom trashcan, the search warrants add.
"Also found downstairs in the common area was a razor blade on an end table that had a white residue on one side," the search warrants read.
One of the home's residents disclosed that "he had observed both [of Penny's parents] using straws to inhale their prescriptions," according to the search warrants. The documents add that both of Penny's parents denied "any illicit drug use and state that they consume their medications orally as prescribed," and they reported that the paraphernalia belonged to either of the residents.
Provo detectives are still investigating the case and are waiting on more reports from the state medical examiner, Provo Officer Nick Dupaix said Tuesday.