PROVO, Utah —
Family and neighbors identified the estranged husband as Darren West, who has been in prison on drug-related charges.
Roberts said police believe West and Huntsman were together when the babies were born.
"We don't believe he had any knowledge of the situation," Roberts told The Associated Press
Asked how West could not have known about the situation, Roberts replied, "That's the million-dollar question. Amazing."
The babies' bodies were sent to the Utah medical examiner's office for tests, including one to determine the cause of death. DNA samples taken from the suspect and her husband will determine definitively whether the two are the parents, as investigators believe.
Huntsman also has three daughters — one teenager and two young adults — who lived at the house.
Neighbors in the middle-class neighborhood of mostly older homes 35 miles south of Salt Lake City say they were shocked by the accusations and perplexed that the woman's older children still living in the home didn't know their mother was pregnant or notice anything suspicious.
Late Sunday, West's family issued a statement saying they were in a "state of shock and confusion."
"We are mourning this tragic loss of life and we are trying to stay strong and help each other through this awful event," the statement said before asking for privacy.
West pleaded guilty in federal court in 2005 to two counts of possessing chemicals intended to be used in manufacturing methamphetamine, court records show. In August 2006, he was sentenced to 9 years in prison, but appealed the term three times. He maintained his innocence and said he never had any intention to manufacture meth.
West's sister Sarah Wright wrote to federal district court in 2006, saying West is a good father to his three daughters. She said he worked at an excavation company for 11 years and is an avid outdoorsman who likes to fish and camp.