"I don't have any doubt that Colby and Lacy love their kids", Sgt. Spencer Cannon of the Utah County Sheriff's Office told KSTU.
Confessing to their crime, the couple said they tried hiding the two-month-old baby's drug addiction from the nurses in the hospital where she was born.
Christenson was in the store at the time with her other children, all under the age of 8.
Wilde reportedly took several items off the store's shelves to return for a cash refund. Christenson faces similar charges, but hasn't yet entered a plea. The two-month-old girl also tested positive for heroin and morphine, according to Fox8 Live.
Wilde crushed pills of Suboxone, a drug used to treat heroin addiction and withdrawal, and forced the powder down his daughter's throat. Wilde picked up the auto seat and dropped it again and "Handed the vehicle seat and the child to a stranger and then got in the vehicle and took off".
Wilde and Christenson, 26, were initially arrested on June 26 in connection with a theft at a local Walmart, according to the sheriff's office.
According to police, Wilde grabbed the vehicle seat and ran out another door, hitting a pillar and dropping his daughter again. As he ran from security, he collided with a sliding door and dropped the vehicle seat carrier with his infant daughter inside, according to the sheriff's office.
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She gave birth in April, but authorities busted Christenson and the baby's father - Colby Wilde - last month when authorities searched their home in an unrelated case.
As bystanders tried to stop Wilde, he handed the vehicle seat with his child to a stranger and ran to his auto to escape, the sergeant said.
Christenson was waiting inside the Walmart with their two sons and another son she had from a previous relationship.
Using the description from Walmart loss prevention employees a Deputy with the Utah County Sheriffs Office, who was near the area, found the suspect driving away from the area and stopped him in the parking lot. He was booked in the Utah County Jail on suspicion of a DUI, possession of heroin and methamphetamine, drug paraphernalia and driving without vehicle insurance.
The parents were released on bail earlier but were later arrested again after Wilde was caught smoking heroin.
Utah Valley Hospital, where the girl was born, released a statement to Fox 13 in Salt Lake City, in which officials said newborn safety is a top priority. When a mother does not disclose a history of drug use and her baby has no signs or symptoms of difficulty, then the hospital proceeds with its established care processes.
Spanish Fork Police were able to get in touch with the Utah Division of Child and Family Services, who took custody of the four children. She was also arrested.
Christenson and Wilde are facing four counts each of child endangerment and felony drugs charges. As for Wilde and Christenson, they are sitting in jail. They were both also booked for possession by use of heroin and methamphetamine, endangerment of a child, a third-degree felony, and possession of drug paraphernalia. Both are being held on bond amounts of $10,000 cash-only each.